Is a turnkey wooden house possible under €300,000?

First of all, many heartfelt thanks for your numerous replies.

I already suspected that one might hit a wall here regarding the desire for a gallery. Since I have never built a house before, the question arises for me why a house with a gallery has to be so much more expensive than one without? I understand that the entire house has to be built somewhat larger, but fewer ceilings and walls have to be built inside. The dreamer in me somehow hoped that this would balance out somehow. That does not seem to be the case.

Does anyone have experience with how much additional costs a gallery entails compared to a house without a gallery in terms of the price per square meter?

Does anyone perhaps have a real empirical value?

Considering the fact that we do not place great value on large bedrooms or a huge bathroom, I think that 3 bedrooms, plus living room plus gallery can definitely be realized in a 130 square meter house. Whether this is feasible price-wise, of course, is another matter.

And just briefly between us... for me this topic, as I have apparently impressively demonstrated, is absolute uncharted territory. Please forgive my naivety given the green spots behind my ears. It is always amazing to see how some people rant in internet forums... Yes, some are even at a loss for words

What is so astonishing about that? With electronics, research is done for days, and with construction projects that cost hundreds of thousands, you should at least exercise the same care and show up with basic knowledge somewhere. You’ve already received a price indication, what don’t you like about it? Oh right, you don’t have big demands except for a gallery, so the price can’t be right.