It might be worth a plumber to send a camera down the main sewer to check the condition. 

They set door codes, message (or call) guests, schedule cleaners, adjust the thermostat, monitor my cameras, & call a plumber just as easily as I could or as a local PM could, for 1% of the cost.I wrote much more about this exact topic in this post here.

I currently hold a 9-5 job you could say, i do access control, data communication, and security camera installation.  

What brand 360 camera did you go with and where did you buy?

I now have security cameras so I can keep an eye on who is coming and going and something like this would be stopped right away. 

I have a short video of camera from where they dug and went into line.

I have a short video of camera from where they dug and went into line.

@Jacob Hanson we have moved to making sure all the properties we manage have a 360 virtual video (we purchased the special camera a couple years ago for out of state investors to see properties) so that prospective tenants can see the whole place and make a decision about renting before we bring them in for a in person tour.

had the old have you seen a doctor about it line ready. how bout a security camera & sign? 

hoping he laughed off camera.