The tenants are all tractors and initial expense was to black-top, secure property with fencing, and eventually install security cameras.

I want to use ip camera to monitor vacant houses.  

Have a new tenant who just asked to install a Ring doorbell and cameras outside of her front and back doors.

I don’t have any job site camera which is about to change.

I have a rental property with security doorbell and floodlight cameras which were there before tenants moved in.

You may consider planting some cameras to keep an eye on things.If you think it would help to report him or sue him, that's your call.

I have security cameras installed, planning to put in a better system just waiting for someone in my family to go with me.

@Theresa HarrisWould cameras have to be placed showing that area, also can tenants be charged the fee of garbage removal if they don’t do so themselves ?

The drone has a range of 6 miles and has a 4K camera. 

If you are purchasing in a cold climate this can be a big issue.Sewer line: I suggest you pay the couple hundred bucks to run a camera down the sewer line and see what kind of shape it's in.