If you go through Disney, I remember them telling me it would cost between $300-$400 per contract(I have 2). The reason for this cost is Disney requires a title search and this is most of the fee.
There is another way to do this without Disney though. You can call the Orange County recorder of Deeds and they'll help you figure it out. What you do is get a standard Fla Quit Claim Deed form, fill it out and send it to the ROD's When you fill it out, you quit your claim to the deed but when you list to who you are quit claiming the deed to, list yourself and your daughter with joint rights of survivorship (JTRS). In this way, you are adding an owner along with yourself. The one catch is that the county(state?) imposes a tax on any remaining outstanding mortgage you may have. Other then the tax, the fee is nominal. Disney will tell you that there is another way but they really won't explain what I just did...spruce