Any non-cloud smart thermostats out there?

[silvrr]

I asked about z-wave thermostats awhile back and got a few responses. This one was recommended and is about 1/2 the price of what you linked. I

https://www.thesmartesthouse.com/collections/thermostats-1/products/radio-thermostat-z-wave-communicating-touch-screen-thermostat-ct101-iris-version

Zwave Thermostats

See the last automation in the link I posted above. Something similar could be done (less automated) with an input select to specify a duration and have an automation monitor that and kick the fan on for the time selected.