Yeah... my parents moved to us when we moved to a place we could afford housing. And this is what I mean by 'nuclear families beget extended families'. If you have a close family, they will want to be together. My parents knew we could never live where we grew up. Thus, they made plans to follow us as (1) we are a young family and I (the sole breadwinner) needs to be in a place where I can work and buy a house and (2) they are older and have made their money and are more adaptable. As it stands, most people can do this because most parents are having two children. My brother moved to another area, but his wife's family (and hers is much bigger than ours... layer upon layer of nuclear families to back them up) is there, so as it stands, we are both well covered by family.