If he's offering the seller financing, there is a reason and you should dig to uncover what that reason is or you may be getting taken for a ride. 

A title search would have uncovered this.

Digging deeper, I uncovered an eviction and a total of nine landlord tenant cases (none of which came up in my screening services eviction report BTW), a prior bankruptcy, and a prior foreclosure on a house that was inherited (just cashed out to get loan).Saying no is easy sometimes.

Sounds what you're looking for is, you want to make an offer that will get him to uncover his magic number.  

Also, you don't want uncovered windows that either look vacant or a person walking by can look in and check out the merchandise to steal.

One bad uncovered claim and poof, there goes everything.

Many shouldn't be, but they do, so I guess an inspector is a good way to put them in their place and readjust the level they "believe" they are at.My main use of a home inspector isn't to actually uncover issues, but rather to write up an "official" report to lean on the sellers with and get them to lower their price.

You can actively look for off market deals by sending mailers, cold calling owners, knocking on doors, etc which might uncover a deal.  

I had uncovered a few scammers over the years using "identity theft" to rent.

Let me know when you would like to deep dive to uncover your winning investment strategy.