Then I would seriously consider your own creditworthiness (worse) if the construction project is an owner-occupied residential property. Or they can just sell it to you well that way.
Probably not, since the previous preliminary discussions took place without any examination. Could they sell it to me well? Probably yes, since I had already anticipated it beforehand. I am currently still comparing and by the way, I meant the tip seriously.
Now I have also been told that I have relatively good chances of meeting the KfW70 requirements with a timber frame construction, as we plan to do.
You can hardly defend yourself against this type of construction, but the technology also has to fit. 50k per residential unit at currently 1% over 10 years, but there is a limit regarding the ratio to the total value, which I don't know exactly right now. In any case, financing the entire property through KfW is also not possible.
However, without more specific information this is no longer productive. Rental properties are planned differently than private residential construction; here it’s about return. That means you first have to know how many residential units of which size, what is the achievable rent value per m², what type of construction is planned, what is the initial situation (i.e., how much traffic area is created), what the land costs.
Rule of thumb: The larger the house, the lower the price per m² = more return. An 8-unit building is more profitable than only 4, the reason being the centralizable technology. Small apartments often rent better than large ones and bring more rent per m², but the turnover is higher.
I would first check how many residential units are legally possible, then ask the banker up to which amount he will participate, and then plan with a concrete project. Of course, you should also know what rents well in your area and possibly include special housing in your considerations (age-appropriate, etc.).