If your leasing application process is thorough and well thought out, and if your lease agreement has been well drafted by your local attorney and if it includes clauses that permit you/your property manager enough latitude to maneuver and anticipate undesirable tenant behaviors, both actions and inactions, and you have operational processes which align with enforcement of your lease, then you've done all you can do to reduce this inherent risk of an undesirable tenant.  

I do not know him, but the path he is leading you is a difficult path    Note difficult does not imply impossible; there are people who are successful with S8 housing    In my area s8 is so undesirable that they write laws trying to make it challenging to not allow S8 tenants.  

He won't do undesirable designations. 

Note i put forth effort in an attempt to maintain a leveraged position   With the recent rate hikes, my equity position has never been higher which i consider undesired (but teading 3% rates for over 6% rates is more undesired).  

They don't associate cheap with undesirable. 

Lower your price, not your standards.Your house is either priced too high, or it's in an area that's undesirable to good renters.

In order to limit that, I sometimes didn't screen as carefully as I should have and ended up with some undesirable situations that I could have avoided by screening more carefully and tolerating a little more vacancy loss.

I can easily come up with the remainder needed to finish off the mortgage, however, that leaves me in a bit of an undesirable spot.

Examples of pitfalls include purchasing in an undesirable area, not understanding the market values (vs. list prices), not knowing the rental values (current and market), inheriting bad tenants, buying a lemon, going rogue on renting and management with no contacts / systems / no legal understanding of PA and Municipal landlord-tenant laws, not having trusted resources and contractors in place, using out of state lenders or shaky financing, throwing lipstick on a pig when renovating a house and wondering why it's ARV isn't increasing, tenants are renting, etc.

How do you think these peripheral markets will evolve in the next few years, especially as both groups continue to look for opportunities?