How much should we expect to spend?

So my three of my friends and I are planning to spend two weeks in Florida over the summer in honor of graduation. We'd be going to Disney World, Busch Gardens, Universal Studios, Discovery Cove, and SeaWorld (if it's open =/). Ignoring the cost of tickets and a hotel room, how much a day could one reasonably expect to spend a day, if you didn't go all out and only bought like, one or two gifts a park?