Some smart people decided to use kerosene heaters and barbecues indoors.

Currently $230 for a gateway and 2 indoor motion detection cameras.

Keep it simple.Heat, light, and indoor running water are too complicated for most tenants also, but the socialists want the peasants to have these things.

They pay in advance for many months, then change the locks and turn the house into an indoor growing operation.

People wonder why I have the most mellow indoor dog in the world, and it's because I exercise him outdoors every day.

Such as: freezing pipes in the winter, overheating in the summer, tenant actions that endanger your property (such as cooking with BBQs indoors, using candles for light, use of extension cords from one dwelling to another and overloading of electrical circuits), humidity build up, garbage overflow and vermin that follow that, etc.

In January in Cincinnati you will be busy shoveling your driveway and staying indoors as much as possible, and as most of the city does.  

Normal indoor levels are around 40 to 60%. 

I agree with Parker and also fujitsu has  a heat pump system that has one outdoor unit with ability to have multiple indoor units/zones.

Heating costs go up in winter, as does electric due to the reduced natural light and people being indoors more.