There is a place in Orange Beach, Alabama called "U Own It", which really took off and is in high demand. Large storage garages for RV's and Boats. Set up under Condominium Laws, subject to monthly / yearly dues.
Then in Gulf Breeze, Florida we have a place called Santa Rosa Yacht Club, which is a marina with wet slips and dry storage. This is also set up as under Condominium Laws, and all the slips and dry storage are sold. I know some people that purchased several, and then rent them out. Just like you do when you come to the beach and rent a condo for your family.
The upside of this, it is a way for the developer to receive a faster payout for the investment.
The monthly dues keep up the management and maintenance.
Below are the links to each, respectfully.
http://uownitstorageal.com
http://www.santarosayachtclub.com