I would also run a sewer line camera and see what that looks like.  

That's one of my concerns but some Airbnb hosts are taking the initiative and rehabbing houses, putting security cameras, etc, etc, basically improving the street, they're definitely helping Detroit be a safer area, less blight.

That's what everything gets hung up on.And yes, if you get another clog there a camera look is in order.

Send a camera down and see what is plugging the line.

I had the line camera-ed at that time and located and the damage was directly under the newly installed patio. 

Manage contractors, get better entry point on deals, know the neighborhoods you are flipping in, pay to setup mobile camera (initial costs up front) will save you so many headaches down the line.

Eventually multiple camera scopes revealed pipe had settle and was bowing down.  

Hi guys,I'm working on a 6 unit apartment building, and would like to purchase a camera based security system.

I bought my first 3Flat property and need advice on security cameras.

Currently for my primary residence I have a Ring system which works well and provides the basic surveillance that I'd like to have for rental properties; perimeter motion lights with cameras to record parking lot and back alley activities, "check in" on the grounds to ensure the landscapers are actually showing up, no one has graffitied the fence, determine false alarms on a vacant property, etc.