Suggestion - a camping air mattress. Years ago I used to have major back pains. a doctor recommended an air mattress and I have been using them ever since and no longer get back pains. I usually buy the coleman brand because they last me about a year and I get them when they are on sale here for a double for $19 - $25.00. I cover the mattress with a comforter or mattress pad and then make the bed like normal.