The unit could sit empty, but the expenses, fixed and variable costs of the unit are reduced, no maid services, no additional electric used, so the funds reserved should cover holding the unit.

You technically give all your power back to the grid, you can't run your house off of a solar system when the power is out (without a backup battery system due to variability of solar output).6) I wouldn't install on an old roof, no issues otherwise.7) solar company will discuss location and output before instillation, non issue.  

There are so many variables that you haven't mentioned, so it is impossible to say if this LTV is good or not. 

There are many, many variables involved so it really comes down to cash, financing and your skill set.

A typical 5+ commercial loan will run you 30-35% down, the rate would be variable adjustable rate based on prime rate + a certain margin based on experience and the deal itself (strength of the asset).

There are several main hurdles to overcome for you to realize the higher returns of ownership over leasing:- Get all the variables needed to accurately underwrite the deal- Permitting for the facility (this will likely be a large portion of non-CapEx budget and the timeline)- Get a PPA with a power company- Get financing for the deal- Find and secure a contractor that will correctly build the facilityEdit: One other thing to note, most of the developers in that area are looking for facilities in the 1,000 acre range, so you may have some size/economies of scale disadvantages but that's to be expected vs. large national and multi-nationals.

I would recommend having a Real Estate attorney draft you a set of contracts with blanks to fill in the variable information that you can use for both sides of the transaction.

We have had very minimal contact with my mother because of the rehab's rules for the first week there.I know these undeclared variables make it difficult, but I have a few questions.Under the situation that my mom gives them permission to attempt this, the numbers don't add up if I am seeing them correctly.

It is hard to predict the future of real estate since there are simply too many variables that could affect the industry in the future.

All in all, while not considering other personal yet important variables.