Last year I did the same thing you are planning to do, I am still happy that I did it. There is not much difference between our units, as for fuel mpg a little less than truck 5th wheel. It all depends on driving style and a head wind or not. I had a dully to pull 5th wheel and handling was never a isssue. With MH I find it just alittle bit harder. I have not done the CHF thats talked about here yet, I have not felt the need to yet.
When I did my PDI with CW in Iowa they seemed to want to rush me through. Maybe it was because I owned a rig before I do not know. You are going to want to slow them down get answers for everything, forget you have owned a unit. I know alot of folks are having trouble turning the drivers seat around, you may want them to show you how. I had trouble with the King tv ant. make sure you get good reception on all your tvs
Retired and never looked back