Equipment: standard?
One thing is: what is included in the standard. The other: what do YOU want?!
Underfloor heating: I am skipping it for cost reasons, there are radiators
That was clear! But for 99% of all building or buying hopefuls, an underfloor heating system belongs in a modern house. You are already excluding your house from the target group if you ever want to sell.
However, I don’t want to throw myself into the pot of just building something that others like. But you have to sometimes submit to contemporary technology when it comes to reason – and that’s what your house construction is about, right?
Sanitary listing: I need to ask
Ask the costs from the contractor, look for the wishes within yourself!
Rainwater: also not in the offer
Exactly!
And as long as these cost factors are not clarified, the question about financing variants is hardly sensible, as it is calculated with wrong numbers.
That’s what I mean: all your discussions here are scratched but not thought through to the end. Some questions remain open, they’re not answered. Maybe you have answered them yourself by now, but apparently not.
Since I also lack the knowledge now (no desire to look through all the threads) about what your future plans look like, I would advise: build a bungalow with nice equipment. You don’t need a basement. But an extra €150 per month for a great tub, a walk-in shower, or underfloor heating won’t actually break the bank for you.