Other then that, most of the time you’ll just need the Carbon/smoke detectors and fire extinguisher.

@Greg Parker Do you not require that of the tenants in the lease, similar to light bulbs, smoke detector batteries etc...?

If you can't get the smooth stroke motion I'm talking about to work, stop.

BP has a link on this site for avoiding a scam; https://www.biggerpockets.com/...If they don't have a real business, and are some guy with a gmail account, be wary, check addresses, get their banker and attorney contacts if your BS Detector goes off, and my favorite way is to right click their picture in Chrome, and search Google, and if he comes up with different names, you found one. 

This researcher had built his own EMF detectors and together we probed houses of the cancer patients, located the EMFs, then my job was to eliminate the EMFs through installation of a ground rod, or moving the wires creating the EMFs (usually the mains running through the ceiling).

Reason for all of this talk about Akron - Rule 39, a Motion to Seal Eviction Records of Tenants.That would have been horrible wouldn't it?

However, some suggestions:  rent a junkyard dog, hire a patrolman, motion sensor high beam spotlights, board up all windows and doors with 3/4 plywood.Seriously--just try to harden the property and let the neighbors and local precinct know about your concerns, and provide a contact number. 

Maybe make some motion activated for when they disappear into the dark corners.  

-Bring existing structure to code(electrical, smoke detector, window egress size, etc.)

I had to hire a BK attorney in this state to file a motion because the spouses's attorney is playing games and my attorney isn't familiar with this states BK laws and didn't want to risk making any errors.Builder had a total of 3 loans on three different spec builds and he stole draw funds on all 3.