I don't know if you specifically have to have a house. If not, Bonnet Creek is wonderful (1, 2, 3, and 4BR units). You actually have to drive onto Disney property. Our unit (a 2BR/2BA) was in building 5, and we could sit on the balcony each night and watch the fireworks from both Magic Kingdom and Epcot. The resort is gorgeous with a lazy river, several pools, mini-golf, and an activity building (also transportation to Disney if you wish to use it).
I got mine from an owner off ebay. You can check that out. Find an ownder with great feedback, SquareTrade verified, and Paypal protected. If they don't have the dates you want listed, email them and ask what they could get your dates for (you can email several sellers if you like) and ask if they would be willing to do an auction for you for the agreed upon dates and price. That's what I did, and it worked out great. Just be sure to use your credit card to pay for extra protection.
Several people on these boards have used Ken Price with great success (
http://www.vacationupgrades.com). BTW, it sounds like the prices on the site can be negotiable, so you could contact him about your dates.