Hi,
Welcome to the Dis!
Boy, you are brave!. Are you sure you want to share with all your relatives, LOL?
First of all, when are you going to Disney? If you are planning a trip during a holiday, you will pay premium price for a 2 br 2 bath unit. Sometimes, it is cheaper to get two connecting rooms in some hotels.
For the most room, renting a house or condo is your best bet and may be cheaper in the long run than staying at a hotel.
My hotel suggestions in the Lake Buena Vista area are Vistana Resort and Vistana Villages both by Sheraton. Summerfield Suites trio unit by Wyndham and a Residence Inn LBV or the new Residence Inn at Seaworld (which just opened, I believe). Marriott website has a special intro rates on the new RI at SW. I like RI and have stayed at the LBV location. Some of their units have two br with 2 queens each and l pullout couch in the lr plus free bkfst. All of these units are within a l0 min drive of Epcot and MGM. MK and AK are gonna be a little longer drive.
If you need more ideas, ask.
Herc.