The portability and lack of contract make it ideal for your purposes.

In addition, the individual offices were of the old style were the office walls were something of a flimsy somewhat portable walls.

The answer for me is portability.

The manufacturers of Traditional Self-Storage Buildings (Trachte, Betco, Janus, Mako, USC, etc.) also build portable units that can be delivered already assembled, or erected on-site.  

I think central heat/air could go out of style if ductless heat pumps become cheaper and easier to install or if window/portable heat pumps become cheaper, more compact/sleek, or more efficient.

Obviously there are more logistics to consider with this but the beauty of a tiny home is that its portable. 

Their process typically consists of using a drylock type paint to cover the mold to kill/prevent it from spreading and they use a portable ventilation system to vent out the air containing mold.

Including a portable crib and games goes a long way. 

Looking for info on getting started in portable storage.

I don’t know if the area is right or not, but I have heard of some investors doing glamping, portable tiny house, or renovated airstream for rental.