Get cameras for outside the propertyAlso make sure you jack the price up for Holidays, this helps prevent parties.It is a pain to try and get anything back from Airbnb from past experience.Hope this helps!

The helper Plumber thought it was concrete, but couldn't be sure as he had no camera.

Set up a camera, catch him in the act, and press charges.

Consider limiting your images to about 10-15, use better camera/lighting and make sure the problem areas are not pictured for everyone to see. 

@Steve Sherman install security cameras at the property and notify the tenants the storage area is close from 11PM to 5AM and they are not to enter during that time.

.,3) Provide tenant with video feed of camera at his front door and send alerts if strangers show up or if there is any security issue like attempted breakin.

But yeah, you're probably screwed on this one unless you have a camera in your store.

I actually got it on my surveillance camera!

A digital camera is also essential, as well as a notebook with a log sheet and printed maps of the farm area.

He can have a camera run down the line to see exactly where the problem is, and if there is a consistent buildup, or a root problem, he should run a cutter blade down the line all the way to the street or septic tank to open it properly.