Will the adults be sleeping two to a bed? Then I'd leave the couch as a couch and simply push the tables around and there is plenty of space for 2
ECVs.
If both the table and couch beds are being used for sleeping, it'll be tight. I don't know if it is possible to leave the ECVs in the hallway until everyone wants to sleep, then move them in to charge overnight. The extra space when the beds are folded out is mostly walk-way area. There is space in front of the fridge, some open space in the bedroom and our stroller fit between the table bed and the front wall. My DIL was told that 2 ECVs could fit in a Little Mermaid room, so I think it's doable in the family suites.
C-Paps and even an oxycon will fit without a problem in any of the Disney resort rooms. In the AoA family suites, there's a bit more floor space in the bedroom area than in the living area when the table and couch are in the "bed" position. But the oxycon should tuck nicely beside any of the beds without being in the way -- same with the C-Paps.