Construction costs are currently skyrocketing

At the same time, I will make sure that they have to deal as little as possible with care, estate execution, and burial.

That's exactly how it ends up with us. Despite having one child, when it comes down to it, we have to "self-care," meaning nursing home, care home, whatever. That means I have to have income to be able to pay these costs. If we're unlucky, then for 2 people, either at the same time or one after the other, which would be more expensive. And that worries me, and for this reason, we do not regularly have the most expensive champagne or any kind of bling that I don't need (example). I am 72. Everything with my daughter is arranged through a notary in that respect; at least she hasn't depended on a dollar from us so far. Her boys, the only children on both sides of the family, are expected to inherit more than enough from several sides.

Excerpt:

"After the term of usually xy years has expired, those entitled to the heritable building right generally have a preferential right to contract renewal with cyz. If the property owners let the contract expire, they receive compensation from cyz amounting to at least two-thirds of the market value. If the house is resold, the former heritable building right holders receive the full market value. Thus, cyz goes beyond the legally required minimum. Since the year blabla, it has been possible to extend heritable building right contracts with a remaining term of five to 40 years according to personal wishes even prematurely."

Only that you do not then automatically get the extension at the previous leasehold rent. It then adjusts to the respective market interest rates.

I have already explained that.. it is still under 200€, the adjustment was 5€ ... etc. It is already stated in the forum.

A "further major disadvantage" looks a bit different to me when it comes to numbers...
For example, that you only deal with it negatively and then possibly won't build at all because the financing won't go through with 150,000€ more for the land purchase. Just because alternatives are excluded.

If the plot costs 150,000, you won't get it with a ground lease of 200 euros at today's interest rates either.
And if you then pay 300 or 400 or 500, the bank will calculate it the same way.

I say from experience that this is nonsense.

I say from experience that this is not nonsense.

Can you please explain or provide a source? Thanks.

Probes are designed for a specific withdrawal capacity, there are formulas for that (google). The drilling person does that for you. If probes are overloaded, they (or more precisely their surroundings) can freeze, which is either irreparable or requires a considerable amount of time to regenerate.

Sources are forbidden here.

Since Monday, I have been heating with Hotboy. I can give you an update tomorrow on what has been running until then. The drilling has been there since May, but it is not allowed to be used because of the risk of freezing. As far as I know, the heat pump is also not there yet ;)
...

Our heat pump has long been there but is stored at the heating technician's warehouse and will only be installed once the flooring is laid. Since the screed heating would run anyway over the heating rod and not via the probe, it makes little sense to install the heat pump now; the Hotboy works just as well.

Regarding screed prices: €13/m² for 100 mm insulation fully laid, screed heating 60 mm for €16/m², each net.

they receive compensation from cyz amounting to at least two-thirds of the market value.

It’s right there. Of course, you can sell or inherit it during the term. But if the contract expires and is not renewed, you get two-thirds. The lessor will certainly not do the devil and pay you more than the minimum. And with that, the lessor has you in their hand. If you as the owner do not agree to the new price, you simply lose one-third of the value. That quickly puts us in the range of 100-150k. And if you sell the house now, every reasonable buyer will also take that into account when determining the price. Especially with not very long remaining terms. That makes your house lose value compared to a house that belongs to the property.