These SBA loans supposedly DO apply to sole proprietorships (and other business structures, like LLCs, etc.)So the question is: As rental property owners, even if we don't have employees, are we able to apply for one of these SBA loans for our rental property business due to the uncertainty of economic conditions caused by COVID-19 (namely, our tenants' ability to pay rent in the coming months) or is this just wishful thinking on my part?

Recessions do not affect every person from each social-economic class in the same way -- but the virus has the ability to.

If you the ability to purchase, right now is the time!  

@Chris Chase  I doubt they'd check, but if they want a bill have your sister help you and write out an invoice with her name on it. 

Also did you send them a bill?

They just don't have the ability to recapitalize. 

Then you have to determine what you actually say. 

The CARES Act suspends this rule so that net business losses for 2018, 2019 and 2020 can be used without limit.IMMEDIATE REFUND OF CORPORATE AMT CREDITThe TCJA provided that the alternative minimum tax no longer applied to C corporations.Those corporations with AMT credits were given the ability to recover these amounts as tax reductions and refunds over a four-year period (2018-2021.)

They are available to small businesses directly affected by the COVID-19, or that offer services directly related to these businesses.Applicants must have good credit history, the ability to repay and be physically located in disaster areas (economic nexus does not suffice).

Documentation for non-rent payments and making sure to have information that the COVID-19 pandemic has directly caused tenants ability to pay will be hard, but extremely important.