One of my father’s neighbors out in Missouri had ten children, as I do. They were pretty well off - big extended family, farming and trucking, some local elected officials. Their house was around the size mine is, but it had one tiny bathroom and a tiny kitchen. Only the ground floor had electricity and running water.
My aunt and uncle had 10 kids. originally had a 1 1/2 three bedroom Started packing the boys in the daylight basement and put a shower down there, and squeezed another one in the half bath. The place was always a freaking mess, bedause they had a farm and mom worked part time, just busy lives. after the kids were out they renovated. turned it into a nice home.