Own work in new construction - what makes sense and is feasible?

That’s how I know it too but that is no longer standard today, nowadays people build turnkey and install click floors and paint.

Know-how is available on Youtube today – what you need is man- and woman-power, and a lot of it for a long time. Do you want that? That is the only question to ask. If yes, you can save a lot of money.

Exactly there lies the crux. Back then I really had zero knowledge, Youtube didn’t exist, so I had it explained to me and tiled the entire basement and the small bathroom. Was it flawless? No, far from it but there was no alternative.
Maybe you should choose materials that you can also process yourself, align everything consistently to what you can accomplish yourself.

I would actually have to discuss that with my extended family in the end, in our case it’s about childcare, because otherwise I already estimate that we have (wo)men power, meaning endurance, etc.
If it works in my parents’ room I could also imagine it in the utility room etc. Maybe not necessarily in the entrance area where everyone walks through. But I suppose it’s mostly a matter of practice.
By the way, I can also understand the lifting sliding door, all our friends with new builds have one, but I find it rather impractical. Therefore it’s not a deprivation for us at that point, but something many do spend money on.

No hostility. Just direct honesty. If you really want to, you can do almost everything on your own. All insulation work inside (roof, under floor heating), laying floor heating (many heating installers do this because you can’t really go wrong with continuous laying), walls and floors, chipping slots for the electrician, outdoor facilities (as long as no heavy equipment is needed), fine installation of sanitary installations. These are all things that someone who isn’t clumsy can very well do themselves. Even large-format tiles are quite doable for a layperson with the means available today. The easiest way to save costs, however, is always to avoid producing costs.

Then that’s settled :) Thanks for the pointers, I will consider one or another point. I definitely agree with you. We also would have planned our house one meter shorter, but our architect persuaded us that it wouldn’t be a big cost saving and would provide much more living quality. I also understand the arguments (bathrooms, etc. remain the same number, so the extra meter is not worth 2000€ per sqm), but saved money is saved money. Maybe we will reconsider that. Beyond that, I paid attention to cost sensitivity in my “own” house design and it was basically adopted (bathrooms stacked, compact building structure, no bays, no dormers). I had read intensively the book Attraktiv Bauen mit kleinem Budget, in case anyone is interested. I found it quite good.

I honestly misjudged this build with what I wanted to do myself

If you didn't write countless "forum novels," you'd also have more time for the construction site. :D

Wouldn't you write countless "forum novels," you'd also have more time for the construction site. :D

Ohh, usually that venom only falls from your face half-drunk at half past two in the morning. But you probably like to read my boring stories and they sweeten your dull evening in the musty chamber. I always write them extra long for you, honey! Well, that's been weighing on you since the chat and wasn't allowed out :D ... show it to me properly, then you'll feel better soon. You're the little guy who only braggs but never dares to show his own corner once, right?? :D :D :D

That's how I know it too, but that is no longer the standard today; nowadays, houses are built turnkey, with click floors laid and painted.

In the past, people also built with their childhood friends in their hometown. Today, one moves away for studies, then realizes that they can't afford anything decent in the university town and moves out. The friends from university are all theoreticians and half of them have long since moved to other cities.

My suggestion is just a small drop on a hot stone and somewhat underrepresented here in the forum, but at least: look a lot for second hand.

I also have a drop for that. There are second-hand markets for a lot of tools. A vibrating plate, for example, costs 90€/week to rent at the hardware store. But there are equally powerful plates already used for 200-400€, and then you just sell it after construction. Besides saving costs, you also gain time flexibility.

My suggestion is just a small drop on a hot stone and somewhat underrepresented here in the forum, but nevertheless: search a lot for second hand items. Garden furniture, gardening tools, electrical appliances for the kitchen, terrace flooring, and furnishings such as shelves and lamps, beds, desks can be very well purchased used. You just have to search more and you don’t always find anything. But when you do, you save a lot.
Just today I bought two folding blinds each 250cm long for a total of 100 euros. It was definitely worth waiting until I found something suitable. And step by step, the money you don’t spend adds up.

That’s what I call more sustainable and climate-friendly than some ventilation systems :)