Two bedrooms (leave the kids rooms alone please) and a den or family room converted into sexy play areas should suffice. Two bathrooms (preferably with showers) is good, as is indoor and outdoor lounging space. Think livingroom and deck or patio. Hot tub and pool are big bonuses.
My preferences noted above. Also great fun squeezing everybody into a really small apartment. Fun like Twister.
Slutty Wife ;-*