I am currently composing a business plan for the development of storage units in my home town.

- deal with security - build walls to separate parking areas (not much internal room for this)- convert all into locked storage space with garage doors and charge extra?

I have a contract on a 49 unit self-storage building plus a 4 unit commercial storefront. 

flipped my first one as indicated above, bought a fixer upper and turned to a VRBO, bought 4 duplex. now closing on a 49 unit Self Storage unit with 4 storefronts.

Personal key ring (everyday use) - 2 car keys (one for the sedan, one for the station wagon), 2 house keys (one to our own home, one to our Airbnb home), 1 key fob for entering my work place.Rental property lanyard (x2) - 7 keys to storage lockers, 2 keys to storage sheds, 1 key to 8-plex storage room, 1 key to 8-plex laundry room, 1 key to 8-plex broom closet.Rental property zippered bank bag - 1 key for post office box, 1 key for 8-plex laundry room, 1 set of 2 keys for our 8-plex coin op laundry machines.Rental property key rack (in a secure room at our home) - 17 key rings (one for each unit).

Or did it have an oil tank? 

I’ve been looking at a self storage facility.

Talk to a plumber and the firm that pumps the septic tanks.  

My upstairs unit heat is working great, except in one room (middle bedroom).No heat was coming out of it when I got the property, but my heating guy flushed the system, bled the radiators, replaced the water tank for the furnace, and all was well.

--Self storage, Mobile home parks for example