

A cheap solution suggestion, not sure if it fits your requirements:
- a dumb heater with manual switches
- a remote controlled power plug for the heater (e.g. zigbee)
- a remot thermal sensor (e.g. zigbee)
- a simple HA automation that checks temperature and turns the plug on for X mins
- a fire alarm to prevent that from burning down your building


Unrealistic by german standards. As if you couldn’t buy every type of Christmas sweets in September already.