$25 electric heaters are the most powerful.

None of the electric heaters I've found that run on 110 volt wall power go over 1500 watts, 12.5 amps. So just get a little "1500 watt utility heater".

In two days I will own a monstrous snow blower.

This is a well timed and effective happy thought. I am optimistic that it will significantly reduce my hatred of snow. Which is good. There is a lot of it in my driveway.

Last year by the time I got around to trying to buy one, they were all gone. I didn't get one before then because I had great difficulty picking one, and whether to get a farming tractor with a blower attachment, or standalone blower. In the end, I made my dad pick. Fortunately we have similar tastes.

The people who refill my gas and installed my heaters can't look at them until tomorrow, and then they would have to order parts. Hence the temporary wall power heaters to keep pipes from freezing.