One problem with RV growing is unless you rewire the electrical system you'll stand a good chance of burning out the junction box and they're not cheap. They're just not wired for high voltage. Another problem is obviously they're small and not much spare room for even a 4-5 plant closet grow. I tried it and pulled the mattress off and used the flat platform under it for a couple dozen plants and had to run an extension cord outside to use the hookup directly instead of running it through the RV and it was a total pain in the ass! After 2 and a half months I pulled out and went to the wilderness for the last 3 months to finish them. I ended up buying a proper house and now grow in the backyard. BTW, I am legal to grow but I can't see how an unlicensed person can safely pull it off.