I was thinking of instituting a similar range but my house is well insulated so would maybe keep it from 70-80 Im far from a lawyer but I do not think there is a law governing the temp ranges for STR/MTR. 

Double check that they simply didn't turn the temp up too.How did they find out you were reusing a fridge from the dead guy's apartment?

A mobile has virtually no wall bay thickness, no attic (slows transfer of ambient temp) and under a mobile is very poorly insulated.

If I do this, then I can hire out a temp in that area just to show the property? 

I've been able to find some nice homes $400-500K in Chandler/Tempe that could make good vacation rentals, but the yearly revenue is going to be lower than Scottsdale. 

, driveway permit, crush & run, site prep (clearing, grading), and temp power pole.

With it being garage ready the temperature gauge on the thermostat goes below 40*, which is nice if you ever moved it to the garage for any kind of kitchen rehab or to another property for garage use, in the winter (until it gets to freezing temps outside) the it keeps working. 

I saw a social media post about some kind of business that has people that are willing to stay in vacant houses that are up for sale and they make sure it’s show ready every morning. I can’t find anything like it on g...

We jacked up the center beam slightly, and put in temps so we could remove the rotted columns.

True words  @JD Martin  most people do not realize that a heat pump can take a while to raise/lower the temps inside a house.