Using awards for just about anything in Orlando is a bad idea. However, given you obviously want to do it ...

25K each for four coach seats, leaving you with 50K. You can then transfer whatever miles you need to Hilton to get a free room at the Hilton at Walt Disney World there, 50K miles is enough for 100K Hilton HHonors points, which should be enough to get you your room.

Of course, another option would be to wait for the next set of auctions, and they seem to include a WDW vacation every other auction, so you could bid all your miles on one of those (the WDW auctions are typically for four persons), which includes air fare, hotel, and usually a rental car even.