Your cousin was very fortunate there was a university and a dental school near his Mom's home...that also accepted him. Most students need to leave their local neighborhood for an education, especially if they are getting an advanced degree. They go where the programs are.Ok I don't watch the show but has anyone heard the parents tell the young adult sons that they could not move out, live on their own, or experience college? My cousin (very educated, he's a dentist) did not move until he was 35. He felt comfortable at home and he loved his parents. Do you think that it may be weird because these children really do love their parents and you don't see the "normal" rebellion of teens in there family?
My problem is that the eldest is being encouraged to think he has a chance at law school, while living at home, not enrolled in a regular university. He will have to have a degree, and very good lsat scores to even be considered for law school. Once there, he will have to perform at a high level. Most law schools are particular about their bar pass rates and they don't keep students in that are barely passing or failing. He needs some realistic understanding of what it takes to get in, and stay in law school.
Oh, and rebellion has nothing to do with it. Generally rebellious kids aren't knocking themselves out to get an advanced degree. One needs to be highly motivated to achieve at law school.