Also some people desire battery backup for reasons like critical power loads that can not be without power for even a fraction of a second such as life support systems/ important electrical equipment, or "preppers"/survivalists that desire full energy autonomy for peace of mind, or locations prone to power outages where people work from home and require reliable power, etc.

Is that the full security deposit or only a fraction of that?

It immediately occurred to me that those listed are probably a small fraction of actual number of REI’s in the area (Martinsburg WV is in proximity to MD/DC/VA).

Selling them all at once will likely drop the price of all of them if they are in the same area, but I've seen C/D class properties sit on the market for years and get bought/sold for a fraction of listing price when the seller gets fed up with waiting. 

That represents a small fraction of the additional return one would expect based on 60% leverage in a deal.

@John Hagen, Tenants in Common is both simply a way to own real estate (as tenants in common, single tenant, joint tenants, etc) and a name for a specific passive fractional ownership of real estate that has been set up according to Rev Proc 2002-22.The products listed by @Jacqueline Gardiner are the latter. 

This way all the fractional owners will get 1st lien position on the property; as one mortgage. 

My husband owns qualitykitchensforless.com and can ship anywhere for a fraction of the cost of Home Depot etc.  

Fractional ownership by the IRA does not change the fact that value held by the IRA is being transferred to you.  

The people who are making money off of rentals in Arlington have owned their homes a long time and bought when homes were a fraction of the price they are now.