The last place to check is where the thermostat/gas valve goes into the water heater.

I am 59 years old and luckily I have been married to a woman who is a computer programmer and has been saving money for about 25 years.

But in the 5-unit, I pay utilities.The thermostats (there are two boilers and two thermostats) are in two separate units.  

I would rather them charge for screening to get some money to hire some programmers to make it fully function

This is the lowest the digital thermostat will go. 

We have a thermostat as well connected and everything it reliable.

Hire a programmer to design a web scrapper to pull the delinquent names off of your county's tax assessor site.

I installed suntouch from Home Depot in my last bath Reno, it was under $400 for mat and thermostat.

Because I have large temperature fluctuations in all months except July and August, I can only assume they will be flipping the thermostat from hot to cold, as night and day ..I had never written into the lease specifics for house temperatures (I never thought I would honestly see someone up a thermostat up that high lol), but I know in my province of Manitoba that during the winter, temperature must be room 21 Celsius during the day and a minimum of 18 Celsius at night.

It is very hard to get a good seal that the paint won't wick under.Remove switch/outlet covers, thermostat covers, etc.