The way I'd calculate is to take total points and divide by how many people are staying in the room, for example (though my MIL and FIL share ownership of one of our DVC contracts so they get 100 points a year so doing math below just as an example):
We have a 2BR with DH, DS, myself and MIL and FIL....it is 313 points for our trip so divide by the 5 of us is 62.6 per person so MIL and FIL would be using 125.2 points. Then figure what you'd want to charge them per point....going rental rates around $16pp or annual dues around $6-7pp or some other figure. I'd say $7pp is a good number. So for our trip, that would be $97.38 a night for MIL and FIL (9 night stay). So $100 a night for the second bedroom isn't a bad number. If they will be in living room on pull-out, I'd probably go less.
We have a 2BR with DH, DS, myself and MIL and FIL....it is 313 points for our trip so divide by the 5 of us is 62.6 per person so MIL and FIL would be using 125.2 points. Then figure what you'd want to charge them per point....going rental rates around $16pp or annual dues around $6-7pp or some other figure. I'd say $7pp is a good number. So for our trip, that would be $97.38 a night for MIL and FIL (9 night stay). So $100 a night for the second bedroom isn't a bad number. If they will be in living room on pull-out, I'd probably go less.