Another thing you could do to save some money is to bring/buy some breakfast and lunch food and make a picnic out of your days and just pay for food at Disney for dinner. We always had cereal and milk in the room as kids and ate in the room before we left.
Now, as adults, we usually don't eat in our room. But, we are picking up some yogurt, milk, and other snacks for our son to minimize what we have to pay Disney prices for. The parks allow you to bring small coolers into the park so you could pack some snacks, sandwiches, and drinks into the park.