It's funny. My husband and my sons have those concerns. The DILs and I think it's worth considering:') They all have got to get their own places. We need our space but 5-10 acrea apart might not be so bad.
About the family compound idea...the only problem I could see is if somebody in the group wants or needs to sell for whatever reason, THEN what do you do. Either the others have to buy him out, or you've got strangers in your midst. Just something to think about.