Buying a disposable RV is false economy. You are better off spending your hard earned dollars on a quality used unit. Too many consumers are wowed by the 3 televisions and electric toilet flushers, but nobody wants to look a chip board construction, throw in the need to get the rock bottom price at all costs and then wonder where the quality went.
As previous posters have said this resembles the automotive industry of the 70's. As long as consumers demand rock bottom quality, oops, I meant prices, skilled workers will go where their skill is appreciated (read $$$)