ANd and FYI about 5 in a stateroom. You will need a Category 4...or a suite (categories 1 - 3), which are big bucks and even bigger points. It is cheaper to get two connecting category 9s or 10s than 1 category 4. And you get much more space in 2 10's.
As others have said, it is not cost-effective to cruise on points.