Have you considered renting points from a DVC owner? We are a family of 6 (3 kids, 3 adults) and rented points for BCV for Sept/Oct. They were $8 per point. If you don't stay Friday or Saturday, it can actually be quite affordable. We have a 2 bedroom that sleeps 8 - master bedroom has king and a jacuzzi bath. The Kitchen/living area has a sleeper sofa and the 2nd bedroom has two queens (I believe). Plus you get a full kitchen with regular size regrig, stove/oven/microwave, dishwasher and stackable washer/dryer. If the adults are splitting the cost, you may actually come out way ahead when you consider the amenities.
Otherwise, I would have to agree - two rooms at AS. That was our original plan before I visited the DVC Rent/Trade board.
Good luck, whatever your decision.