Upper floor as usual - but with technical room on top.
Entrance still variable - because I don't know what is preferred (with or without extra storage, large/small kitchen, large/small guest toilet, or simply a larger entrance)
Washing machine belongs downstairs next to the back door. It leads directly outside to the clothesline, next to the washing machine there is a bag with two compartments, one for 30, one for 60 degrees. That’s how ergonomics works for older people. I know something about that. I have hung laundry many times. k..