Another route you may consider, After adding memory foam mattress topper bed is so heavy and right up against the wall between the bedroom and livingroom I gave up on the bed lift and added slide out drawers. I got the idea from a guy on another forum who has a similar trailer.
by removing the side paneling and using it for drawer fronts and using 5/8" double laminated plywood that I found at a building recycle center for $4 per 4x4 sheet. I used bottom mount 100lb drawer slides (would recommend under mount) but I could not find them in my town.