I like the way your thinking.... If you know your going to install a furnace / heater out there at some point; I would definitely look at putting the money into a Wi-Fi thermostat. This plan gets you the info you are looking for right now & when the system is installed it will do that & control your heating system... IMO that beats buying something twice...I'm only wanting a thermometer to keep an eye on the temperature inside my pole barn. I recon a wifi thermostat would work if I could find a cheap one that way I could hook it to my furnace when I get it installed.