Long story short... our tenant has been in his unit for approximately four months and has reported a greywater backup every month in the septic system (while running laundry, backup occurs in bathtub).We've spent over $6,000 for the sewage company to bring cameras out (4x) and clear clogs. 

Closer inspection of an outdoor security footage (from a disclosed camera) shows that they were hiding the dog in a jacket as they came and went.

Ask your inspector how old is the plumbing if it is not and have a plumbing company put a camera in it and take a look.

I even went as far to say "Your honor, If you would just please look at, or have someone here look at it-- or even hold it up to the camera, well you will be able to see whats going on here!!!"

He did mention if it happened again that he would have to put a camera to make sure there were not any breaks in the pipes outside of my home under the concrete.

I’ve found Mr Rooter is more expensive but they do run a camera to make sure they get all the blockage.

I combine it with a hardwired DVR external camera system.I didn't start out this way.

Add security lighting to the garage area, motion detectors, and/or security cameras.

Seems like this could be a relatively hands-off aspect of the business if done right.As for cameras, my first thought is something as simple as Simpli-Safe, but my gut tells me there's more commercial-centric solutions I should be looking at. 

I am 33 years old and thinking of switching careers from being a career nanny to a real estate agent in LA!!!!