The problem with temperature should be technically solvable at small scale. Something like a transparent fridge fueled by a small nuclear reactor that would tr

The problem with temperature should be technically solvable at small scale. Something like a transparent fridge fueled by a small nuclear reactor that would trigger a thermostat to grant a minimum temperature each night. This could hypothetically hold arctic plants for a while, maybe a lot of time being extra optimistic. A problem would be to protect the reactor and windows to be damaged by sand but if you have nuclear energy you have a source of electricity. The production would be really low in any case, but... not impossible, just extremely difficult.