Determine and breakdown your ROI with and without appreciation, as well your monthly cash flow, and expenses multipliers.

Determine what you are trying to accomplish & focus on that...:)

From that determine your loan to value needed for new financing.

I have done what I feel to be a good amount of due diligence for determining my investment criteria, but am lacking good resources to answer some of my questions and provide general guidance.

The initial group should need to be reevaluated to determine whether just two of them can qualify on their own. 

I am getting quotes now to determine if it is more cost effective to carpet (making it living space) or just paint the cement floors a solid gray (for a general purpose / storage area).

Is this a you don't own/you already own determination?

I like to determine how old the major capital improvements are and how much life they have left.

So your loan amount can be $250,000 and your limit can be $250,000 but in a total loss if the insurance company determines the replacement cost - depreciation is less than $250,000 you will get whatever figure they determine.

@Dilip GandhiSee following IRS link. https://www.irs.gov/Individuals/International-Taxpayers/Taxpayer-Identification-Numbers-TIN