As I see it, you are building very large. If possible, you should try to actually keep the individual floors or optional apartments separate like their own condominiums. Life can be long and offer many scenarios: children grow older, people change, you yourself change. At the time, I didn’t think about laying heating, water, etc. separately. If it ever becomes a multi-family house, you will be glad you did. Additionally, it would significantly increase the sales price if necessary. If everything goes perfectly, that’s great; but if not, you don’t have a burden hanging on you that would be hard to sell. It’s like a contract between friends. You put it in the drawer and it’s nice if you don’t need it. If you do... you are prepared. And somehow I get the impression that you want to make everyone happy in every situation. That’s how the whole house works. Maybe you should also consider another planner and first bundle the real and currently foreseeable needs.