It's not even worth talking about.If you want to get into the weeds, calculate how much energy each item uses (dryer, washer, light bulb, security camera, etc.).

Get a boots on the ground person, set up a camera in the unit (may need to inform the contractor depending on your area), set up draws in advance and require photographic evidence from the contractor are a few options.

Cameras required on parking and trash, decibel meter required.  

Issue one showing up to take pictures of the property with a cheap point and shoot camera.

She said she had to think about something sad to calm herself down so the camera would accept her face. 

Smart locks and security cameras can also help with tenant management and property safety.  

Consider camera moisture inspection in wall if possible.5.

I have since added a ring camera and solar cell to monitor this off limits area.

Is there any camera coverage on that area?

We had to install a camera to hold them accountable to clean up their dishes.