It's not the excessive house size that bothers me, its the lack of permanence in residence.
Why is there so much geographic dispersal in families? It seems the pattern is to move out to an apartment, get married, get a condo, get a small house, get a bigger house in a better school district when you have kids, get an even bigger house when you get the promotion, and sometime after your kids move out downsize to a retirement community.
A better option may be a bigger multi level multi generational house that can be passed down. The only downside is this would rely on employment being mainly based in the geographic region for at least one group per successive generation, however if the family is able to keep its wealth in house they will be less likely to rely on outside employment.
If you're ever in Quincy Massachusetts, I recommend doing the John Adams tour there. He moved up to a pretty sweet multi generational house that lasted 140 years before becoming a historical museum. How many of you want to have a house so sweet that your great grandchildren and beyond will want to live there? Not many, I bet. We just don't have the connection to our own land like we used to.
I don't know, I suppose that only about 50% of people live within 50 miles of where they grew up? I think I read that statistic somewhere.
Part of it is the "American Way", individualism, make your own way, bootstraps, etc.
We moved away from home.
Even looking at family though -
Hubby's grandparents - maternal side were in Europe. Maternal grandma lived in a condo in a elderly community. That was sold when she died.
Paternal side, when grandfather died, house was sold and grandma went into a home. She was there well over a decade before she died.
Parents are divorced. I'm sure the family home will be sold eventually, when MIL dies, which hopefully won't be at least 20 years (I expect her to live until her 90's).
Family cabin on a lake will go to the 2 kids. However, SIL, who lives in the area, just bought their own. It got to be too hard to deal with FIL. SIL and family wants to go whenever they want. After the divorce, FIL moved in over the summer. It caused strife. I suppose that super-long term, there will just be two. One for SIL and family, one for her kids. We don't live there, but we enjoy visiting.
SIL and family own their own home. Both homes (hers and MIL) are very large, so I simply don't see that co-housing would work. Though SIL purposely built her house in a way that her parents could move in when they got older, if necessary. That was before the divorce.
My family -
My dad lived in my family home until he died. House sold, split 7 ways.
My step-dad lived at home until he married my mom in his 40s. My mom is gone now. He owns a camp, a house, and a lot of land. He is deeding some of the land over to my sister (the stuff that is near where her house is. He deeded her that land too.) This is rural though. So while there's not shared housing, I guess there is shared land.
In my experience, there are 2 problems with multi-generational housing that can be passed down:
1. Family members that don't stay where they grew up.
2. Larger families. My mom is one of 7, dad one of 9, step dad one of 6, I am one of 9. Good luck passing anything down like that. At least in my home town, family members tended to BUY the houses (my cousin bought my grandpa's house, my other cousin bought grandma's house. Some stranger and convicted child molester - ran off with a 14 year old girl - bought my dad's house, ugh!)
Even smaller families it is tough.
My local friend M's parents are divorced. For awhile M moved back home (in her 30's), to help out her mom. She also paid to convert part of the garage to a bedroom to live in. Friends said "great, you can inherit a house!" But how? M has a brother too, they all cannot live in a 3BR house. While M's mother is ill, and in her early 70's, she could live another 20 years.
M's brother lived with their grandfather (mother's father), just down the street. M's brother and wife and 2 daughters lived there, and cared for the grandfather who was in a wheelchair. For a very long time. What happens when grandfather dies? The house is left to the children, including those who have nothing to do with the family (5 or 6 kids?). What happens to M's brother? In the end, they were able to buy out the rest of the family, but I don't know the details.
"Passing down" real estate may be a great idea, but it does get messy with multiple children, and long lifetimes. Consider that if a parent lives until their 90s, their kids are 60's or 70's, grandkids in their 40's, great grandkids are teens...long time to wait to get a house. And what if the parent changes their will? I've had a lot of exposure to elderly folks who just got "ornery" as they aged, and changed things willy nilly.