Both of which show up on their record and make it very hard to rent in the future.  

Instead of having the Contractors go to the store whenever they are in need of something, they will notify the Lead who will record it. 

I then opened a complaint with the county who has issued him a notice of correction (front yard junk and feces) but I’m not sure where that will go as the notice is addressed to him wife (who seems to no longer live that the property) who records list as the sole ownerAny suggestions?

How do I look up if a offer or a purchase has been made on a property?

Late payments, high credit utilization, derogatory public records, collections?  

You would have ongoing filing requirements with the State and would need to keep business records and documentation. 

Also, from a public records search, I can see that the bank has filed a law suit against the owners for nonpayment of their debt.My questions are:What is the best way to approach this deal?

You have to record it though.  

Definitely going to take a second look at that HUD and what the title company showed in their records from the city.

@Mel Hayes need to sign a promissory note $45000 secured by the property and record it.