Do you have listening devices/cameras in your listings?

I’m pretty much left to my own devices. 

I have been looking at many connected devices that let you know, if there is a leak or if the sump pump is malfunctioning. 

I know you are feeling the pressure, but selling real estate is not dissimilar from baking a really good chocolate cookie -- you follow the recipe and it happens. 

He has already had to void the lease renewal for one tenant/friend who could not maintain clean standards and has just renegotiated a significant price increase for the second tenant/friend who is falling into the same issue - can't clean up after his dog, clean his bathroom, etc.The point is, without a lease to use as leverage, my buddy would be SOL and left to his own devices to negotiate with the neanderthals he got into bed with. 

Whatever device you are doing it on, you may not be accepting cookies or you may not be clicking the box that keeps your log in every time you go on the page.

Your stats are not dissimilar to other markets.  

If we're going down the ethnic road for advice on how to build a house, it would probably be best to consult a German - lol.While I share your passion for doing things right and making things right when they're wrong, that's original equipment (not the device probably) and the decision to not replace the bracket that holds the wires and acts as middleman for the ground is not a bad one IMO, a decision that many people make, including electricians.

  - I bought a device that detects EMF and found that there are extremely high electric fields in EVERY room

If they are below market it could be a device (read leverage) to help give them an incentive to leave.