My parents had this dilemma in the 1990s, several offspring approaching college and they didn't live in a town with a university. they decided not to buy as they didn't want us all to be "forced" to go to a particular college and, importantly, realised that late-teenagers really aren't likely to be capable of living together without parent/referees. I love my brothers (now) but the idea of living with them without someone in charge
That said, they would have made money, but not necessarily had the family they have now.