I would suggest looking into renting a vacation home. We have used All Star Vacation homes twice in the past with great success. Homes were beautiful and the rental agency was great to work with. www.allstarvacationhomes.com I know other people have had great success with vacation rentals by owner but I felt more secure going through an agency.
We rented a beautiful 4 bedroom 4 bathroom villa with heated pool and hot tub and full game room with pinball machine and game system in the 'finished' garage for a much much cheaper than staying on site. We were 7 adults at the time. We stayed in a slightly smaller house but still with a full pool for 4 adults and 1 child a few years later and had an equally good experience.
Look for a large rental home through VRBO. We've had luck several times using it. You can even try to negotiate a lower rate with the home owners. Good luck!
I prefer homeaway.com to vrbo.com because you can look at your search results on a map. For us, location is really important and I like to see exactly where each home is.
We loved this Windsor Hills home. It was decorated in all Disney theme and was very clean and well kept. They have 4 properties. We stayed in the Kingdom.
We loved this Windsor Hills home. It was decorated in all Disney theme and was very clean and well kept. They have 4 properties. We stayed in the Kingdom. http://storytimeorlandorental.com/ Very close to parks and a wonderful resort pool with amenities.