I just rented points at OKW this July and it worked out very nice. I paid about 120/night for a studio. You would fit fine in a two bedroom. (I'm not sure though if you have 4 adults and 3 kids or 2 adults and 3 kids, either way for the price difference, the baby could sleep in a crib. I'm pretty sure that's allowed. One bedroom has a king size bed, the other, two double beds (OKW) or a double bed and a pull out bed (BWV, VWL, or BCV) I'm not sure about Saratoga Springs. There is a full kitchen, living room, washer/drying, jacuzzi, 2 bathrooms. Also a pull out bed in the living room.
I think it would definitely save you food money too. Especially for snacks and maybe even breakfast. You can get daily towel service for a fee. With that many people you might want to check it out.
If you're trying to save on money, I really recommend OKW. It's the most reasonably priced, has the largest rooms in all of Disney. We all loved our stay there. Last December, we enjoyed "resort hopping" for meals, and then got to see the decorations at several throughout our stay. We stayed in Building 62, it was right across from the Main Lobby, Main Bus Stop, Pool and Olivia's. I had heard that there are no elevators, but this building had one. The DVC owner I rented from requested that building for us. With the kids, I wanted things to be convenient.
It's also nice having your car right outside the door, (if you have one).