Floor plan revision, tips and experiences for improvement?

Save costs with a smaller house. You can also plan well with 150m2. 50m2 * 3000 euros is 150k that you need for [Doppelgarage] and [Hang].

Are there already any information about the building site? Have you asked the neighbors if there is rock present? Why did the previous owner back out?

Would it possibly be wiser to integrate the garage downstairs a bit, with technology, storage room, utility room, and then build two floors on top? It should simply not exceed 200sqm. Or leave certain rooms unfinished?

No, it is certainly not wiser to integrate a “large open-plan garage” into the house and build rooms that are left “unfinished.” That also costs money. Three stories cost money. You also have to like turret construction, which has further disadvantages. I can’t believe it: the whole discussion is because “the woman wants the mainstream idea of going directly from the garage into the house.”

I can't believe it: the whole discussion just because "the woman wants the mainstream idea of going straight from the garage into the house."

I'll say it like this, happy wife, happy life. The neighbor in the west even has the driveway all the way up to the garage with a 15% incline. Why not?

Here is a first draft with approx. 150m2. Kids downstairs. Living and parents upstairs.

I’ll put it this way, happy wife, happy life.

forgotten? The floors are to be divided later into two apartments.