Thought I would chime in,
I couldn't find a vehicle that fit my needs and my budget. This is why I converted my own. I said that to say this. If you can find a manufactured model that fits your needs and wallet, I would definitely consider it. BUT remember that the RV parts are just as cheap. You could build a truck for cheaper than usual. A third idea would be to by a cookie cutter for cheap and customize it with the currently cheaper parts. So I guess my opinion would be to keep your options open. Not very helpful, huh
Burt, feel free to email/IM me. I'm not an expert, but I'll help if I can.
Doc Weaver