Mostly minor things, but a number of serious things, including significant wiring problems that could be safety problems, undulated siding all over, sediment in cold side water connector, HVAC not cooling sufficiently (return vs supply temp).

My main concern is a) my tenants' safety and b) that people don't get defrauded.  

There will be some costly expense that you didn't account for and because you have no margin of safety in turnkey since the margins are so narrow and the turnkey provider took all the profit out, you will be stuck with what you thought was a 30k profit and maybe a 10% return get slammed down to maybe 3k profit and 2% return for example.

You need this for safety of having multiple exit strategies ... in other words, you always need a profitable exit plan B if your plan A does not work.

There are some, though, if you you are patient.  

I'm actively looking for a couple more properties in the area and have found only one area thus far that made me uneasy or question my safety and that was the president streets in Phoenix, they were pretty sketchy. 

Sort of a safety net for me as I move forward, so to speak.

RE has social aspects, it serves a physical need for citizens, shelter, safety, there is a civic purpose in the RE market.

The landlord has right of access for a fire and safety inspection with proper notice, should be in the lease.

The underlying purpose of the permits is (or is supposed to be) safety.