I have been thinking about this issue myself. I was going to by a motorhome and pull my 20' enclosed trailer with it, but I think I am leaning towards a 5th wheel trailer with a garage.
You can get a toy hauler 5th wheel in the 40' range with slide outs and a garage in the rear that will hold a cobra (or whatever other toys you might have). You can buy alot of trailer for 50k, that will be nicer than most motorhomes out there. I already have the truck, but even if you were to buy a truck and trailer you could have a very nice setup for about 100k or so.
Here is what I am talking about...
http://www.campingworld.com/rvsales/...rottle/149241/