I am assuming that the OP's location of "Central NY" would mean that the most convenient airport would be Syracuse. Is that correct? If so, then the best I am getting with a "little" flexibility (SYR-MCO, 1 connection, 1 day before or after target dates) would put the price at about $230 r-t on Delta (about the same on Northwest, but goes via DTW); this itinerary has you flying out on the Sunday and back the following Monday - so missing one day of school (flying back any earlier is $100 more per person). If you can miss two school days, then the afternoon of the 14th also gets you a good fare (~$250 r-t).
Another possibility would be driving to someplace where it's not school vacation that week (PA, NJ, OH, or even Buffalo) then flying from there. Plugging in the specific dates into Orbitz, and selecting airports within 70 miles of MCO (which does not include Tampa, all of 72 miles from MCO), there seem to be decent one-hop fares out (in the $275 range r-t) of Buffalo into Daytona and Melbourne, neither of which is that far away.
Moral of the story, do some research, throw in a little flexibility and you should be able to do it at something approaching affordable (esp since you have a free place to stay).