I had a third axle installed on a 2013 Mobile Suites. I had a motorcycle lift put on and the over hang was more than recommended. I cut the wheel well opening and bought the fender flare that they use on their larger trailers and a truck shop moved the hydraulic jack toward the rear and put the axle in place.
Mobile Suites 38RSSA on order 3/15/21
2014 Tiffin Phaeton 40QBH for a little while longer