Nest Thermostat E Has Me Pumped!

[Mark Smith]

So I've always loved the idea of the Nest thermostat since I pay for gas in my two family, and now that they have come out with this new cheaper "Thermostat E" I'm even more interested. I know I need to check to see if it is even compatible with my heating system, but my house also doesn't have wifi. I really only want wifi for the sake of being able to connect to and control the thermostat, I don't even want my tenants to know the wifi is there since the house doesn't already have it. Does anyone have any suggestions on an inexpensive way to do this? I don't even know what to expect to pay for wifi!