I second the suggestion of a Home Away From Home resort. Depending upon the, ahem, relationships involved, you might be able to get away with one 2-bedroom for your entire party. The 2-bedroom features a king size bed in one room, two queens in the other, and a sleeper-sofa in the living room. They also have full kitchens (you can save a TON on food if you make a grocery store trip and eat breakfast and lunches in your room), a living room, 3 TVs (two bedrooms and living room), two bathrooms, balconies, etc.
To really save, check the DVC boards for information on renting points from a DVC member. The rack rates for these rooms will probably scare you off--nearly $500 per night--but you can do it for a fraction of that cost by renting points from a Vaction Club member. Again, check the DVC boards or send me a private message if you want details on this process. Trust me--it is not a scam.