@Bridget Grant for one, your biggest and absolute mistake was not having a title company run title on it.

I think your biggest barrier is finding an asset that will meet DSCR requirements in your target location without having 40-50% down.

The due on sale clause will be the biggest worry, even though it's uncommon for banks to enforce it, they have the opportunity to at any time.

They typically also vett the former owner with the Pennsylvania Department of Revenue.  

Here are the five biggest companies that have made the decision to move from California to Texas, according to the latest Forbes Fortune 500.- Chevron- Tesla- Oracle- CBRE- HP

That's a good example of a 'healthy' mortgage market albeit fairly astonishing that banks would consider the revenue data accurate and consistent enough to lend on.

Cut free of your "golden handcuffs" with the minimal interest rates on these properties and sell them all (or the biggest headache properties) and do a 1031 exchange into a bigger property or package of multi families where the cash flow is better, numbers make sense, and you can streamline property maintenance and management rather than having 6 different single family homes. 

That will go a long way to answering some questions.Check out - https://www.awning.com/airbnb-estimatorThat tool is similar to AirDNA for basic lookback on the area as far as occupancy and revenue goes.

You should only pay when revenue is collected.

Working with them is the biggest mistake of my real estate journey.