Help with new engine decision

I think that if you feel that you are able to replace an engine in your motorhome, you should be able to diagnose any newer motorhome before buying it. With the experience that you have from years of ownership, and miles traveled, you should be able to identify a good one from a bad one. I look at the frame/suspension, engine, transmission, structure, wiring, and water damage as being the most important things. Everything from there is easier to take care of yourself. If I was in your situation, I would look for a newer motorhome. There are units out there that are in real nice condition for not too much money. You might have to keep an eye out for a while, but they are out there. Current gasoline prices are your friend.