If rough neighborhood add security cameras and barred windows as selling point. 

I always bring is systems specialists as well as General Inspection.I bring my plumber for sewer line camera inspection-extra $100My roof guy for his opinion- usually free or I pay him $100 just to be cool and he appreciates it.

I have heard of some investors putting up cameras to see if contractors are stealing materials from the site and so forth. 

There is a surveillance camera facing the front door and the HDTV, it records all movement and sound. 

Had a camera put through the plumbing and discovered roots in the clay sewer pipe.  

A good camera system and alarm are a must.

Have had multiple camera inspections of my pipes, and they show a crack in the cast iron pipe which caused the backup.

"Put camera in sewer Sewer pipe is aprox. 85 feet long and the first 75 feet of the sewer isPVC, which indicates that the sewer has been replaced up to 75 feet.There is a belly at 20 feet where pipe goes down then back upAt 75 feet the pipe is shifted (most like due to improper bedding.).

The plumber used his snake camera, could not find a significant blockage but told me that he did see "bellies" which would be around a $20K repair and would consist of extensive plumbing work around the house.

They aren't that secure (anyone with a crowbar could access a locked one), so I think next time I'll stick an outdoor web camera facing them.