I called about 5 times over the past 5 days and they never get back to me after they supposedly talk to their programmers.

As mentioned, they will shower twice a day and run the laundry for one item ... they will also leave the lights on and raise the heat even when they are not home (they are always overriding the programmable thermostat installed to save them money).  

This not a wifi thermostats.

You might also take this time, as a reminder, to change the batteries in your thermostat, replace your furnace filter, and clear your air vents to ensure your unit is working to the best of its ability.4) This is also a good time to disconnect your exterior hoses. 5) It is also now time to change the batteries in your smoke detectors.

(It costed us $6k in oil the first 3 months of winter when we took over the property)The previous owner had the 1st tenant control the thermostat and had been spending over $10k in oil every year.Now, we installed NEST to control the temperature from our phone and have invested in changing the heat to gas.The heater has been on since the temperature has dropped to 40degrees at night.We have set it to 73 degrees.This morning I get a call from my 1st floor tenant that the heater is not working that it is too cold.I contacted my 2nd and 3rd floor tenant and they say it seems cold but they use portable electrical heater in the room to keep them warm.We are planning on renewing the lease and need to raise the rent.

And to add one more, we use August smart lock ( and nest thermostat) in our out of state house and kwikset in our primary. 

Now, contrast that with creating a custom site: find a web programmer, hope he is pretty good and doesn't create spaghetti code, when something changes or breaks have to deal with that person again.

A pellet stove set to a thermostat is the most efficient way to heat a unit that guests can actually understand.

(Linens, service fees, keypad, thermostat, noise monitor, etc.)Anything helps!

Those programmer people could do it I'm sure.