Thank you for your answers. I think the biggest obstacle was perhaps mentioned by Yvonne. A friendship and neighborhood really are not a particularly good basis for a business.
Regarding the equipment, I have a question mark as to whether single-family house rental applicants find an apartment standard attractive. And for couples in their mid/late thirties, I would perhaps already consider these houses for own use when the children have moved out - or even then for the children.
However, it is supposed to be about maximizing the return. The current housing market in the town does not allow any special wishes regarding the equipment ;) At least Party A is already looking forward to having their own 200 m² to themselves when the children have moved out...
Has anyone already prepared an investment calculation? Do you have any practical personal connection to the topic (are you a construction contractor, craftsman, tax advisor, or property manager)?
Yes, various calculations. Depending on how the parameters are set, we come to, for example, an equity return of about 9% / gross rental yield of about 6% / net rental yield of about 5%.
In our municipality, the whole thing would not be possible at all, since the buyer has a construction obligation of 5 years and must then use the property themselves. Is it even allowed to build rental apartments here?
There is indeed the obligation for own use, but experience has shown that the contracts are quite flexible when the right arguments are presented...