How do you find them among all the thermostats available? 

For the existing home: I have to install a separate heater that is thermostatically controlled from inside the apartment - I found a nifty little unit that will do the trick for under $300.

.- remember that you'll be paying all utilities if you rent by the room, so factor that into what you charge for rent, and consider using remotely-controlled nest thermostats so they can't jack the heat up beyond what any normal person would pay for (if you're in a cold area). the same could be said for a home with central air in a warmer climate.- consider baking into the rest biweekly housekeeping, so that you know that the property is being kept up with (prevents pest issues), and you won't have to deal with any quarrels over who's cleaning the common areas more than who.- always have the parents co-sign the lease.- make a manual for them. what would your own kids be calling you about when they first move out on their own?

I have a smart thermostat installed so I can monitor the usage also.

Once the filter was replaced and we hired a handyman to teach the tenant how to use the thermostat all problems were resolved.

New metal roof & gutters, new covered porch, new side deck Trex material, new large capacity water heater, new Bluetooth thermostat, new sump pump, new HVAC ducts, new HVAC lines, new LED backlit mirror, new electric wiring for entire house, inspected and up to code, new plumbing is all PEX line plumbing, What made you interested in investing in this type of deal?

:-new metal roof that will last a lifetime-new gutters-new covered porch-new side deck entrance made of Trex material-new large capacity water heater -new Bluetooth thermostat.

Love that you can imbed videos on stuff like how to use the lock, thermostat, tv, and anything else that may be confusing. 

. - Install two new high efficiency condensing boilers, and update windows and insulation for better heat loss performance.PROS - a) minimally invasive; b) can provide 15-30% reduction in heating costs (we are told).CONS - a)total gas expense is still paid by the landlord; b) individual units won't have individual control (except for a thermostat controlled shutoff valve for heat/water in each unit); c) AC would be available on with in wall/window units. 2) Try to individually meter each units' gas and provide each with a traditional forced air heating/cooling system.PROS: a)gas expense could be completely removed for landlord (huge)- even tankless hot water could be installed in each unit; b) each unit would have their own climate control.CONS: a) constructions costs of running new gas lines and soffiting sheet metal duct work. b) highly invasive with collateral construction costs; c) future costs of maintenance on multiple systems vs a single building-wide system. 3) An electric based heating system- This is tricky in my mind because of the high cost of electric heat.

IG: @MattPriestJr I have properties that I rent by the room in King/Pierce/Snohomish Counties.Many pro tips.For heating, I use Nest Thermostat and "lock" the temperature on 68 degrees.