[Brokentoy]

These are built in my hometown, by folks I had a men's Bible study with.
In this area, Timbersleds outnumber snowmobiles by a fair margin.
I went to purchase a year old Pro 800, and the salesman told me not to bother if I had a lot of experience on a dirt bike. He said a Timbersled would not disappoint.
Many locals ride them, I still haven't pulled the trigger. Not really cheaper than a sled, unless you ALREADY have a 450 mx bike.
Kits are around 3500-4K if I remember, but allow you to swap back to a bike in the snowless months.
Sidehills are effortless, as the bike stays upright. They don't like packed, flat trails, as they tend to wander until you get to the good stuff.
Easier to store, and 2 fit in a full size truck.