Hey, I've found a 2002 roadtrek 190 class B for $18,000 that I'm looking to buy. It's in great condition inside and runs great. The things that causing me pause is underneath is some serious rust, especially around the propane tank. I was talking with a friend that said it could be a good deal still if I get the rust taken care of and replace the propane tank. Has anyone had experience with this, how much does it usually cost and is it still a good deal?