FWIW-
I have 2021 CForce 600 Tour. I also have a long 300' x 15' driveway on a pretty good hill. The upper flat area is about 35' x 60'.
It is a little complex, because wind nearly always blows west>>east, large sagebrush along the sides, and a black lava ravine. It takes me about 1.0-1.25 hours to plow the whole driveway with ~10" (~26cm) snow on it. I actually think it would go faster if I had a Non-Tour model, because turning radius would be smaller. I use HI range going down the hill and LO range coming back up the hill. I also usually have to clear ~10'-12' X 150' to the mailbox. I just push this one time to curb-side, the rest of the times to center of street. No big deal, 2 houses here on dead end street, ends at black lava ravine (me), and next door clears the way to main connecting street.
At any rate, an ATV or UForce can move a lot of snow pretty fast. If you have 3.0 hours of plowing, that is a heck of a lot of length or snow or both.
My garage is just under the house, no particular heating in it. Things don't freeze in it, stays about ~50F-55F (~10C-13C). I don't have any trouble starting the 600, motorcycle, or the diesel truck.
Outside may be close to 5F (-15C), but inside stays above freezing. Do the plowing, put it away, reconnect battery tender and everything works fine the next time.
Be aware that plowing snow is considered "Severe Use" and manual says change oil/filter at 20 hours, so that really means 10 hours for snow duty. Others have said the first hour of use yields the most junk in oil/filter, so you could do it sooner. Just be sure to keep track of hours on snow duty. Use JASO MA2 oil, not specified in owner's manual, but others provided that clue. If something goes wrong, I'd just say I was playing in the snow. blah blah blah.
Other comments here:
https://cfmoto-forum.com/introduce-yourself-and-your-ride/new-owner-cfmoto-cforce-400/?topicseen https://cfmoto-forum.com/x6/cforce-600-tour-snowplow-fab-install/YMMV