Renting points is going to (likely) be cheaper than directly through Aulani, even with the winter sale. You could pay a fee to have them come clean the villa a couple of times if that is important (they include one cleaning with a week stay (maybe it is just trash and towel service?)) -- it will certainly be less than a day of parking if you are paying cash. Depending on when you want to go, DVC rooms may not be available (they were sold out right after the 7 month point for the week we are going in Feb) and in that case, the current deal is pretty decent. Especially if you book through Costco and do it in time to get the free meal voucher. The Costco packages include transfers or a rental car - if you don't plan to tour Oahu a ton, the transfer option will save you probably $500 over a rental car (car fee + parking). We figured out it would be cheaper for us to do the airport transfer package and rent a car for 2/5 days from Alamo on site than to have a rental car the whole time. That parking fee is so high!