I've done camera work and the plumber said they see light root growth, but I could clean the pipes annually to prevent growth and back ups.

Oh, by the way, if you have a steady amount of properties to take photos and tours you might benefit from having Giraffe360 camera and take pictures yourself.

I carry around a moisture meter and thermal camera for those very reasons because you never know what a couple of stains could mean behind sealed walls.

The police took back the parks from the thugs and drug dealers’ placed cameras and identified and arrested muggers; arrested drug dealers and put them away with harsh sentences.  

Amazon has many different security cameras and alarms that are pretty inexpensive.

Check on the property often and install cameras if you think it will be a problem. 

. $19.99-29.99 Blink Mini 2 (latest version) plug in smart camera with audio - https://www.amazon.com/Blink-Mini-2-Camera-White/dp/B0BWWZXW...So this is available as either standard or with the weatherproofing.

I have in the past hooked up cameras and paid for wifi until the house sold or rented, but setting  up and then cancelling the service was very expensive too.

Installing a camera seems like a good idea, but it won't really stop the issue in my opinion. 

Looking for best recommendations when it comes to security cameras, motion sensor lights, key pad locks, ring cameras?