Buying a two resorts makes sense if you know you want to stay in two specific places that have tight availability. Or even one specific place, and your other contract is for a less expensive resorts. You do need to understand that owning two resorts only gets you home resort advantage for those home resort points....i.e. if you own 50 BWV points to get a room at BWV over Food and Wine and 150 SSR points, at eleven months you can use those 50 BWV points - or 150 if you bank and borrow three years worth of BWV points - but none of those SSR points can be used to book that BWV room until seven months out.
Over the years, several newbies to
DVC have misunderstood this and have tried to work the system by buying a lot of cheaper points, and a few expensive points - and it doesn't work that way.