I'd like to integrate this into my management process, preferably one that is QR code capable.

The strategy that has normally worked for me is to put up a fight even if it means suing them first (before they sue you).

I hold a note on an investment property we sold to a contractor 'friend'.We lent him $9k against the increased equity BUT couldn't add it as a 2nd (had a workers comp lien he was still fighting to resolve) but the signed agreement was we would advance the $9k by increasing the principal amount of the existing mtg by the $9k.

Alright alright alright . . . the heavyweight fight is on.  

Does the business have adequate personnel on staff for all 3 shifts, or someone who lives on site capable of filling those hours?

In my opinion, you don't have a lot of ammo to fight this battle so to speak. 

The hope is the HITS are not life threatening and you live to “fight” another day. 

It wasn't some great job with matching 401ks that put families into covered wagons just to fight native Americans... it was dream of property ownership. 

Yes, our team of Realtors, Management Professionals, and our contracting capabilities provided all parties with excellent service and endless options.

This pain is going to be either in you labor, legal fights, tenant issues, but most likely a combination of all of them.