That is terrible advice and, obviously, the people who take that advice fail catastrophically because, as it turns out, brides don't really want you to be learning how to use your camera on their wedding day.

Best way to confirm status of Cast Iron Pipes is to have a plumber run a camera down the line to look for breaks / failures.

Definitely put a "License Plate" specific camera at a narrow point and other cameras and lights at that bottleneck.

Most Security systems only maintain footage for 2 weeks due to camera memory capacity.I.

Pvc pipe in concrete was not wrapped in the concrete.Slab, they need to saw cut and then jack hammer il the slab.Plumber will stick a camera down to check.Good luck.

None of these methods are foolproof, but if you go this route you are aiming to make it more trouble than it's worth.Eyes on the unit: hire security to patrol the house; put up monitored cameras; put up cameras with motion-detection alerting; ask the neighbors to watch; station a guard dog at the unit (not recommended). 

So, our renovations consisted of installing new plumbing, upgrading the electrical, adding better lighting, installing security cameras, and installing all new flooring.During this time, I also had to learn the Board of Zoning Appeals (BOZA) process and worked with different city inspectors.

I contacted a few plumbers and they all said there's no camera small enough to do that.

I know of some in Memphis who have added outside cameras, gated parking areas, security lights, etc.   

Be sure to schedule a preclose walk thru and bring your camera.