Do you store your RV in a public/commercial facility when not in use? We're thinking about upgrading to a B+/C, but the dear Home Owners Assn. won't let us store it on our property. Do many of you us...
I would check Craigslist under Parking/Storage heading. You'll see commercial business as well as private individuals offering RV storage space for rent.
Prices can be as low as $50 to $600 depending on the amenities and indoor or outdoor storage. You should be able to find many for $100 to $150 outside of a major city. In the city then the cost will be higher.
An alternative is to look for an RV Park with monthly spaces for rent in an area you like to visit or near your home.