There's a place beside I-65 just south of the Alabama state line that sells/rents/leases Conex containers. I can check them out to see what they have available if you'd like. My storage building is a 53 foot reefer trailer that was once a construction site storage trailer. it's got a plywood floor, overhead fluorescent lights, a steel walk-in door, and a big bay window with security bars where the refrigeration unit used to be. It's sitting on a concrete block foundation with the axles and landing gear removed.
Jerry