I would suggest looking at the AoA and All-Star Music Family Suites, the Fort Wilderness Cabins, the Junior Suites at Coronado Springs and any of the 1-bedroom
DVC options (OKW and SSR will most likely price out the least, followed by AKV and VWL, then BCV, BWV, BLT).
We really love the 1-bedroom DVC options. I absolutely love having a kitchen and a washer/dryer. I've slept on the pull-outs in many of the 1-bedrooms and they were fine.
The Junior Suites at Coronado will price out higher than the AoA and ASMu family suites, but you will get the amenities of a mod at that resort.
Honestly, the bedding at AoA was very uncomfortable IMHO. It wasn't the bed so much as the sheets and pillows (pillows felt like they were made from foam).