I’m actually working on a family constitution right now, and part of a tight four generation clan. And most of the people in my circles are doing something similar.

A few thoughts:

It’s VERY hard to make this happen without it being strictly family. I’ve seen it fail in real time multiple times. In my constitution there is a clause that if an outsider wants to join the family he must change his last name.

Obviously the pictures are ai. But I wouldn’t recommend living that close even with family. Everyone is going to have slightly different parenting styles, and if the cousins are hanging out together 24/7 that can cause tension, and they have a harder time focusing enough to do some school work. Walking distance is great, but not within eyesight imo.