yeah that's broadly how it works, but there's a bit more variation according to how much the college likes its grads. but if you want to do stuff like starting societies, events, get library books, etc, it would be sensible for going for one of the richer colleges. (it's complicated a bit by the fact that some grad colleges, while not having much money, are pretty generous, whereas some colleges with undergrads aren't really interested in their mcrs. but if you go for somewhere loaded and get in, you'll probably be fine.)