Lots of contacts, 20+ showings, 3 approved applications and yet still not rented.

Read the contract and any separate agreement (if applicable) concerning the escrow.

If the tenant has applied for rental assistance, the landlord shall cooperate with the tenant's application, by providing all information and documentation required to complete the application, including but not limited to the W-9 form and any supporting affidavits.

You can also work on getting the sale completed while the application is being processed. 

Today, 40 years later, I still use the exact same type application with MS Access 2003. 

These are questions you need to talk to the bank/lender or your broker about prior to application and credit.This is one of those reason why most loans get denied because this is really creative financing and high risk. 

I match the addresses on their application with the addresses on the credit report because some applicants will leave an address out in hopes you won't call their Landlord, or they will provide fake addresses.

A directory of rental property management software and applications that will help you automate and systemize REI passive income.With a few notable exceptions, most of these we have not personally tried or vetted (yet).

Or they can see old wiring and suggest you hire an electrician for a more in-depth review of the electrical system.If the property is occupied by renters, you should review their leases, payment history, applications, and anything else you can get your hands on.

There is a ton of great information on STR applications here as well as on youtube.