The biggest most obvious surveillance camera plus a nice sign pointing to it.

Say 500’Put up Cameras....high quality vandal deterrent cameras that cover each other.

As for having more guests than stated, we use Ring doorbell cameras and have someone monitoring when the guest checks in. 

If you can find them on Facebook, send them a private FB message that says the same thing.Put a battery-operated deer camera in an inconspicuous place at the end of Day 10, so you can have proof if they come back. 

When I put the SD card from my camera into the computer all the photos got erased!!!

Someone painted FU on our property (not a tenant) just wondering if maybe a "fake" security camera might be a good option or a sign saying the property is under surveillance?

I'd just like to throw it out there that, while I don't have a lot of knowledge in the real estate sector, I do have a nice camera and a decent eye for photography.

I also use Evernote which has a great document capture camera to keep an archive of all my receipts. 

BRING A CAMERA.

Plumber is trying to sell me on checking condition of sewer line with cameras first ($400).