I don't think there is any doubt that Rvs are as a rule poorly made. This starts with poor design, poor engineering and then poor construction with low quality parts. RV manufacturing seems to be all about style. Manufacturers make units that appeal to women by duplicating some of the appearance of a fashionable house. That gets the unit sold and off the lot. Then the unit depreciates at a very rapid rate and generally falls apart after only a few years.
I cannot help but equate this to the situation with auto manufacturing back in the 50s and 60s. Only with foreign imports did the situation start to change. I think the RV industry is ripe for some real competition. Perhaps we will see that if the Chinese enter this market.