I'd like to buy a smaller RV that would be easier to maneuver in parking lots residential neighborhoods (class B/C). We would be selling/giving away the RV at the end of the 1/2 year period so I'd like to buy used and keep my investment under $30k (proceeds from house sale).
Is this maneuverability thing to define your assumptions that a Class A is too big or does it have some other meaning?
If you plan to camp on residential streets and public parking lots, you're already at a disadvantage before the first tank of gas.
It depends on how one is willing to live and the sacrifices willing to be made to pull this off. If you're handy with tools and have some vehicle repair knowledge, it makes things a lot more affordable. If you're willing to repair minor breakdown events, you can buy a substantially used truck and trailer and hit the road. If you can't/don't know how to get up on an RV roof to inspect and maintain, your budget for 6 mos. is too low.
Your learning curve for owning and maintaining an RV, how they're used, and the intricacies of full-time camping won't be done in an afternoon. More like 180 afternoons. If you can actually go camping with a friend and share the experience, it will be time well spent. A weekend camping will eliminate 60 of those afternoon education sessions.