Well, I've driven in lightly falling snow, I mean lightly, exactly once in my life, in a VW Bus - and once was enough. I was creeping at 15 mph, but still sliding around. But, of course, my Bus wasn't equipped for snow driving, at all. I'd gotten caught in it by surprise.
Anyway. Your job. Boots, it's a big undertaking, 3 - 4 times/a week. Is there any possibility at all of starting with twice/week? Even for a month, see how it is for you?