There's an area in my state that has a good number of trails for mt biking, snow biking on large (4-in tire) fat bikes. I rented one at one time and it was fun in the snow. Many trails there are trails specifically non-motorized and non-e-bike.
I would consider getting a folding fatbike as most racks and carriers generally aren't made for a 4+ inch tire, but I notice all folding fat bikes I'm seeing online are electric? And at approx. $1000 usd even for a china direct folding electric.
Why aren't there non-electric snow bikes/mtn bikes commonly sold - is it because being slower fat bike tires, and being perhaps weightier with folding hardware than a common bicycle, they figure it will need some extra boost?