heres an idea, why does it have to be the bathroom, can't you put them in a bedroom? that would be more room...and I don't know, but maybe a pet sitter would be cheaper than boarding them all? and they would still be in part of their familiar home... also the sitter could be there to see when the door on YOUR apt was done and then could call you and then leave? how does that sound? the sitter could be in the room with them or just check on them... just a thought.