The units arent temperature controlled so no worries for malfunctions there.

I am trying to figure out what an acceptable temperature for hot water to pour out of the faucet or shower. 

We've already had temperatures below your average January low (26F, -3C) for Kansas City ;-)

One unit is refusing to keep a schedule in the thermostat, thus leaving air conditioning on 1 temperature all the time.

I can understand if it's a nice high 60s or '70s day and you want to bring in some fresh air, but they often do it when it is more extreme temperatures with complete disregard that the climate system is running.

@Bill Bockwoldt , was nice talking to you again, and thanks for the tip on the attic fan for temperature difference issues.

I would suggest just bolting or welding a hasp across the front of the key area and locking that with a pad lock. 

We went into the attic and noticed water pouring from the Honeywell temperature control panel.  

I have a few locations scouted out that have similar features in case I cannot get all property owners on one block to agree, though I thought a few discussions around each block would let me get the temperature quickly.

Decomposing bodies will ruin the rest of the units and make a leaky pipe look like a minor inconvenience, and it sounds like she will be assuming room temperature in there sooner than later.