This brings into question everything he's told you on his rental application.  

In this case, the reclassification resulted in a significant first-year deduction under applicable bonus depreciation rates.

(Obviously only applicable in states that have income tax).

If you perform a cost segregation study for your short-term rental property, you would typically file Form 3115 (Application for Change in Accounting Method) to claim the depreciation adjustments from the previous year without needing to amend your prior return.

Think of it this way: if we were to screen tenants on criminal background, credit, eviction history, landlord references, and income (3X that of rent and employee verified), even with 25 tenant applications, it's difficult to find a reliable tenant to match all those criteria.

Perform the same task in each app to ensure a fair comparison.Load a property with pictures and details.Market that property.See what your marketing looks like from the public's perspective.Submit a fake application to see how easy the process is.Run a credit/screening report on yourself.Enter a maintenance request, assign a vendor, and attach a fake invoice.Enter charges to the tenant's ledger.Enter recurring charges and automatic late fees.Sign documents electronically.Run owner reports.After testing a few apps, one should clearly stand out.

The loan application will ask about the assets you need for the purchase (down payment, closing costs, and reserves), and you will need documentation for those accounts (most recent statements). 

Focus on affordable housing, such as PadSplit, and understand the application process for Section 8 housing.

I'm a travel nurse and have been sending applications via email.  

Do one task at a time in each app to compare apples to apples.Load a property with pictures and details.Market that property.See what your marketing looks like from the public's perspective.Submit a fake application to see how easy the process is.