Been there on those Motorhome chassis. I did everything but a engine R&R (but I built the engine), one transmission, and one Dana 80 rear end. Oh, I had kingpins done on 2 trucks. I did all the rest myself in the driveway. I had 3 trucks in 28 years and put on well over a half million miles in those almost 3 decades. I don't miss that part of the business.