Too early to say whether the licensing and legislation/reform that's slowly being introduced across the country will clean up the perception but currently this is how many in the industry (particularly the ones you want to build relationships with) view the RE wholesale industry. 

Only a few months and the turned is just going to be some basic cleaning, or has he been in there for quite a while and you're going to have to do a full turn and that may take you how ever long turns take you (lost rental income)?

Clean the unit immediately.

If you want to do a background check and lease for Airbnb bookings, you have to put it in the house rules so you have the guest agree to do it after confirming the booking on Airbnb.We don't do mid stay cleanings, but we do expect a deeper clean after all our MTR stays.

I would see if you could clean the stove grate before replacing it.

I am guessing they do everything including cleaning themselves and must have paid all cash.  

Many national STR PM companies working on a percentage of gross income (Daily rates + cleaning fees) charge an elevated cleaning fee.

But the truth is that property management companies routinely mark up repair invoices to cover their staff cost fro managing the repair.

Also, landlord and tenant are guilty of violating their agreements with the Section 8 program.At this juncture, the landlord should use the security deposit for what it was intended for.... damages, extra cleaning, unpaid utilities, unpaid fees, unpaid rent.  

The best run, most efficient and very clean city I have ever lived in and that includes places on 3 continents.