Is building a house feasible with my budget? Or should I give up the dream?

Yes, that would then be too meager. If that is the case, I would go for a maximum installment of 1100-1200€ and then the financing amount will also decrease accordingly.

If I were alone, I would take a closer look at the tiny house approach.

Even alone (and wanting to remain alone) I would not want to "demand" a reduction below 80 sqm from the OP, which would still be clearly above the tiny house segment.

I would also look less at the big companies and more at smaller businesses from the region. There, tens of thousands of euros for show homes and sales commissions are eliminated.

Owner-managed regional businesses are (as is well known) also my "first choice". But that the customer acquisition costs are generally lower there, I consider wishful thinking.

I also consider owner-managed regional companies to be the "first choice" (as is well known).

Me too, had good experience, significantly better than with a developer 20 years ago.

Even alone (and wanting to remain alone) I would not want to "demand" a reduction to less than 80 sqm from the OP, which would still be clearly above the tiny house segment.

Being inspired is not copying. Some aspects are translatable. The tighter the budget, the more it pays off to get creatively inspired and find alternatives to expensive standard solutions.

Are there actually these low-loader suitable houses in Germany like in the USA, i.e. compact, modular dimensions, inexpensive, only to be placed on a slab?

Are there actually these low-loader suitable houses like in the USA in Germany, i.e. compact, modular dimensions, inexpensive, only placed on a slab?

Unfortunately only very rarely - the ignorance of the contemporary tiny house scene towards the conceptual basis "ISO container" exceeds the scope of anything rationally comprehensible. It simply has no points of contact with their bubble :-(

Unfortunately only very rarely - the ignorance of the contemporary tiny house scene towards the conceptual basis "ISO container" exceeds the boundaries of everything rationally conceivable. It simply has no points of contact with their bubble of thought :-(

Doesn't matter, corresponding concepts can be found in the Netherlands. Nonsense idea: Is it actually possible to create a pond, place the house on a pontoon, and thus circumvent building regulations because you live on a boat?