Too steep slope or solvable?

Load balancing across multiple lines would certainly be possible and also sensible. There are up to 50 Mbit/s available, Telekom has no own lines, therefore only from the municipal utilities. It did not sound as if there was capacity for multiple connections there. The nice gentleman who brought me the 600m / 30k EUR offer for fiber optic also said that nobody has actually gone through with privately sponsoring a connection of that dimension. If the LTE connection weren’t so good, I would seriously consider it. Compared to land + house, that is not such a large amount anymore, and for me as an IT geek, fast internet is almost equivalent to quality of life ;) But with the solid LTE bandwidth, I would first try the 50 Mbit plus LTE load balanced. Starlink would also be a possible addon, although with the tall trees in the north probably more difficult. The LTE tower, by the way, towers right over the village and is in the line of sight from the property, so I am not surprised. Then there would finally be a real use case to set up multiple VLANs and prioritize my home office data packets accordingly in the home network :D

Starlink is also an option.

The previous interested party has backed out and we will officially take a look in a few days with a real estate agent! The reasons were apparently that they still want a bungalow as originally planned, and are now looking for a rather flat plot of land for that.

Now it’s getting serious, which means I will look more closely into some topics. For example:

[*]One full floor and then a 50cm knee wall with a 35° roof seems very low to me, but I might need to look at some examples online.
[*]I assume a soil survey should always be done before the final purchase. Is that possible on short notice? Is it potentially conceivable that the ground might be particularly hard, wet, or similar, so that, for example, a basement or earthworks are not possible as hoped?
[*]With this plot, we would definitely need an architect. But what about the earthworks – do we go straight to the architect with the soil survey, or do you already need a specialist beforehand to know what is feasible on the ground?
[*]Based on the pictures I posted: What do you think about the street situation? It is quite narrow and only usable as a single lane with a turning circle at the end of the dead-end street. It might sound strange, but I was wondering whether it could be tight to drive out of the property backwards. Do you have experience with how such situations are absolutely no problem or could already cause special circumstances, e.g., creating more space for maneuvering on the property?
[*]During the viewing we will also see it from above for the first time, as there is apparently a forest path along it. What is especially important to us is how "usable" one can make the rest of the plot, for the children, planting, sandbox, etc. Does it already need to have a few rather flat levels for that, or can that all be done afterward? I understand that the space for the basement and house can be excavated, but how much "terraforming" can one realistically imagine for the rest of the plot? ;)

The previous interested party has dropped out and we will officially look at it with a realtor in a few days! The reasons were probably that they still want a bungalow as originally planned, and are now rather looking for a flat plot for that.

Now it’s getting serious, which means I will take a closer look at some topics. For example:

[*]One full floor and then a 50cm knee wall with a 35° roof seems very low to me, but maybe I need to look at a few examples online.
[*]I assume a soil report should always be done before the final purchase. Can something like that be done on short notice? Is it potentially conceivable that the ground is especially hard, wet, or similar, so that, for example, a basement or earthworks are not possible as hoped?
[*]With this plot, we would definitely need an architect. But what about the earthworks – do we go directly to the architect with the soil report, or do you already need a specialist beforehand so that you know what is feasible on the ground?
[*]Based on the pictures I posted: What do you think about the street situation? It is quite narrow and can only be used single-lane with a turning circle at the end of the dead-end street. It may sound strange, but I wondered if it might be tight to reverse out of the plot. Do you have any experience as to whether this is absolutely no problem or can already lead to special circumstances, e.g. creating more space for maneuvering on the property?
[*]During the viewing, we will also see it from above for the first time; apparently, a forest path runs along it. What is especially important to us is how "usable" the rest of the plot can be made, for the children, planting, sandbox, etc. Does it already have to have a few rather flat levels for that, or can that all be done afterwards? I understand that space for the basement and house can be excavated, but how much "terraforming" can you imagine for the rest of the plot? ;)

1. It is low. I would work with knee wall cabinets or limit the knee wall with a drywall, e.g. behind the bed. You might possibly get an exception for better usable 100 cm.
2. The soil report should be relatively quick. Fast and cheap, ask your new neighbors.
3. I would definitely build with an architect or a very flexible small general contractor. A site foreman who mainly adjusts catalog designs won't do.
4. Reversing out should be no problem. I rather see a space problem for visitors and would plan 1 or 2 parking spaces in the "front yard."
5. Think about how you want to use the plot. Play area, terraces, pool spot, etc. I would definitely have modeled together with the earthworks for the house construction. Possibly use raised beds as slope retaining. Perennial beds do not have to be straight. A mix of levels and slopes allows you to create different spaces. Create a path without steps for sack trucks, wheelbarrows, etc.

One full floor and then 50cm knee wall with a 35° roof seems very low to me, but maybe I should look at some examples online.

A peculiarity of hillside houses is that they allow ground-level access in the "basement" and thus also large windows. Although the basement is considered a cellar, excellent living space can be created there. This adds to the ground floor and the limited upper floor.

I assume a soil survey should always be done before the final purchase. Can something like that be done on short notice? Is it potentially conceivable that the subsoil is especially hard, wet, or similar, so that, for example, a cellar or earthworks are not possible as hoped?

It is enough to know that the neighbors had no problems. A soil survey before purchase is only worthwhile if there is suspicion of rock (expensive), poor load-bearing capacity (expensive), or contamination (unhealthy).

With this plot, we would definitely need an architect. But what about the earthworks – do we go directly to the architect with a soil survey, or do we already need a specialist beforehand to know what is feasible on the subsoil?

The architect plans the house according to the subsoil, organizes a soil survey if necessary, and helps you find a civil engineer. Building on a slope is somewhat more complicated but not rocket science. Just don’t take a flatland architect, but someone local.

What do you think about the street situation? It is quite narrow and only one lane is usable with a turning circle at the end of the dead-end street. This might sound strange, but I was thinking whether it could get tight to back out of the property. Do you have experience on whether this is absolutely no problem or can already lead to peculiarities, e.g., needing more space for maneuvering on the property?

That depends a lot on how confident you drivers feel with your vehicles. At first, everything is a bit unusual; with the knowledge of the conditions and the resulting routine, it’s usually no problem. My wife, who drives well and very cautiously in new situations, adapted excellently to our significantly more complex situation. It didn’t bother me for a second. Backing out of the property onto a barely trafficked street – where’s the problem?

Do there already have to be a few rather flat levels for that, or is all that possible afterward? I understand that the space for the cellar and house can be excavated, but how much "terraforming" can one imagine for the rest of the property?

It is advantageous to take precautions here and there during construction. If you plan that beforehand, you may be able to reuse excavated material in the garden and save expensive disposal and removal. Discuss this early with your architect, who can help you find the right garden landscaper. How much you want to "terraform" the property is entirely a matter of your taste.

One full story and then 50cm knee wall with a 35° roof seems very low to me,

I would ask the authorities whether this can be converted into an absolute eaves height specification. The distance from the ground floor ceiling to the eaves height is ultimately irrelevant from the outside. However, I would not see a vacuum knee wall alone as a drama; it would only be "too slender" in combination with the roof pitch.