There is an Android/iPhone app called MagicPlan that attempts to use the camera+gyroscope in your phone to come up with floor plans for rooms.

Our desire is to move that wall (and plumbing) 18 inches towards where the camera is, to allow a full bath/shower to fit in the master bathroom, and to make it a bit more roomy -- and to make the guest bathroom a little less awkwardly sized/proportioned, but still comfortable/cozy.  

Again, I'm not sure about California, but in Washington, the Liquor & Cannabis Board have specific guidelines around the types of safe you have to have on premise, as well as cameras, etc, in respect to the security issues that someone mentioned earlier in the thread.

**For non local property managers, install cameras on all your properties so you can keep an key on the property and also provide security for your tenants ;)

In the meantime some ideas might be, battery powered camera/alarm system, install a generator, ect.

The DEA kick the doors in ripped all cameras, alarm, controlled access off confiscated everything out of the building put holes in the walls.

Download whatever app needed for that brand camera. 

You are going to have to find a reputable plumber in the area with a camera and have them look at it and show you exactly what they find.

But I do recommend purchasing a nice wide angle camera.

But I know I'd have been happy if my home came with Nest thermostats, Dropcam(s) in the nursery, wireless mesh pre-tested for that specific floorplan, one of those doorbell cameras, etc.