I converted a travel trailer to an equipment trailer. It works if you've got plenty of welding skills and spare time. I think the biggest challenge is beefing up the cross members. The travel trailer only had a stamped L-bar ever 4 feet so I had to put in another 3 inch angle iron brace between each of those. I also had to cut off the suspension mounts and move them forward and chop off 8 feet of excess length from the 5-inch channel beams of the main frame. If you do all those changes plus convert from a 5th wheel to a bumper pull, you might as well just build one from scratch. I have seen 5th wheel campers successfully converted to equipment trailers too, but they retained the 5th wheel hitch. You might end up being money ahead to buy the trailer you want and sell the camper frame.