The 2 rooms in my basement are heated using baseboards controlled with only 1 thermostat. Even worse, the thermostat location causes pretty big fluctuations because it is far from where we typically sit or sleep.

Ideally, I would need a single portable wireless thermostat that I could locate strategically depending on where I wish to have the most precision. Sometimes, this means ~30ft and 2 walls away from the original thermostat location so rewiring is not possible.

I found the Honeywell YTL9160AR1000, but it's pretty expensive. Do you know any alternative?