DS's Obsession with Motorhomes

My kid has been absolutely obsessed with wanting to go RVing let alone buy a motorhome of our own to use. I'm not sure where he thinks that we could put one of these things but then again when we went to Disneyland for the first time with him, he wanted to tear down our house and build a hotel to live in complete with room service. I think he just likes the idea of being able to watch TV inside the RV but he doesn't even come close to realizing the cost of one of them. Not only would I have to make sure that the thing had an rv extended warranty, there's all the additional costs of registration and everything else. It must be really great to have that child state of mind where you don't worry about even one grown up thought. Sometimes I feel like the bad guy for throwing them out there and bringing him down to reality. The up side is that we can at least vacation in an RV and not have to worry about those costly things of owning our own. If we did then we just might as well move into the thing. LOL!