Quote from @ROBERT JOHNSON:
My Niche is a private Jet Ski storage community
I’m leaning towards each unit being 13’ wide with a 12’ door opening x 25’ deep.
72 Total units on the property renting at 3.00 per sq foot with a 6-12 month lease.
Each unit will have power so you can keep your battery tender
Other amenities being:
Wash, rinse, and flush area
Boat ramp (wide enough for two vehicles side by side) with a dock on each side to tie up too.
Property fenced in with gate code
Fuel for our ski’s 93 and non ethanol fuel (????) I figured if rental companies can keep gas, I can too. However rental companies fuel their own skis. I would have to charge for fuel but would not over charge for gas. Probably just the average price in the area per gallon..
Ice vending
Got it. So this is a boat storage project, rather than housing. Personally, I've done RV and self storage financial models, so a boat storage one would be pretty much the same. However, I would suggest posting this under a different category to get more responses.