There isn't much in the way of maintenance for a hot water heater, other than two things: 1. making sure the thermostat is set at the middle heat setting (usually noted by A, B and C, with C being the hottest).

I have swapped out light switches, electrical outlets, mounted microwaves, light fixtures, thermostats, etc.

added bathrooms, making a total of 3, one bedrooms is in suite, created an open plan, contemporary kitchen with a large island, finished attic and basement, added central heating and air, provided amenities people like as fireplace, wine cooler, wine cellar, smart thermostat and key lock, but mostly we created a contemporary home where there are not many What was the outcome?

As I am looking around for the thermostat I come to the realization that there isn’t one.

Hmmm... perhaps try turning down the thermostat? 

I have already tried setting the thermostat to 70 degrees and having it in a lock box to manage heat/hydro consumption... but they just break into the box and crank the heat back up, or plug in space heaters to keep the house at 75 degrees.

Would love to know what is being used in STR for entrance camera and smart locks and thermostats. 

It means that 70% of the energy used is wasted.Landlords don't install a thermostat. 

I also did LED lighting, and looked for efficient appliances, installed a nest thermostat and water sense fixtures, one of the bigger things I did to start was remove and update some of the lead piping in the home and install a whole house water filtration system since the supply lines from the city are still lead.

I also looked for ways to improve the tenants unit at the same time to make them less likely to complain -- for example, adding a video doorbell and a Nest thermostat.4.