The daily or even weekly ones we go to you have 24 hours to pay the remaining balance so there wouldn't be time for financing.

This is the proper procedure to follow and is designed to protect the landlord in the event that rent does not end up being paid.

Many times people will use the filters on MLS to ensure they find pet friendly rentals and the person who listed the property did not check the proper box but listed no pets in the description causing confusion. 

If the first mortgage’s lien balance exceeds the proceeds from the eventual foreclosure sale, any subordinate liens would be wiped out.

The balance could be over 3- 5 years, let it be a small monthly payment $50. or so maybe 6 % interest and then balloon the balance due at the end of the term.'

Like maybe I could hire a contractor to go and fence off the area properly, but it would have to be a contractor who won't just leave if the guy is there, but who will call the police, wait for them to show up, throw out his stuff, and then finish the job.

The fact they are complaining online might be an indication the property manager dealt with them properly so be sure to ask the manager for their side of the story.I hope this basic guide helps.

If this was a preexisting mtg, and is not in default, after this time the balance should be very low. 

And give them some incentive to do this, such as a break on their outstanding balance, lower payments, lower interest, reduce their arrearage or combination thereof.   

It sounds like you either don’t have a buyers agent due to it being an off market purchase or he isn’t providing proper guidance