As for the wood stove, the only solution I could find was asking, BEFORE Shabbos, a non-Jew to kindle the fire of the wood stove several times a day. The only way that lighting a wood stove on Shabbos by a Jew is permissible is if it is very cold and someone is seriously ill, and their illness would be exacerbated by the cold if the stove is not lit.
*** So you are not violating the Sabbath by turning electric things on and off;****
But someone somewhere is on duty stoking the fires with natural gas or coal to make steam to turn the turbine which spins the generator which then sends it’s electricity to the farm to make the power come on.
Besides, in my days in a dairy when a cow ate her feed, got tired of standing in one spot she was determined to move she would MOVE, often times kicking off the milkers. This caused a loss of vacuum and all the milkers on the other cows would also fall off!!
ALSO, the milkers, being vacuum operated, if there is NO power, the milkers will not stay on the cow but fall off in the manure. Someone STILL has to be “Johny on the spot” to keep them on and the system working!