i am not a fan of pole barn shops, pole barn with dirt floors and no insulation, yes.
but imo, they cost more to build in cold weather country
the roof goes up quick, but by the time your pour the slab, infill framing and insulate the walls the cost gets out of control
stick built on a slab will get you a better building and economical to wire, insulate and finish the walls
i lived in kalispell in 1978 it gets a little
chilly there, i think insulating a shop is in your future
with that sloped property, you'll be surprised at how far into the hill you need to go
maybe a better plan would be to block or poured walls in the hill with a stick framed structure
and if your healthy and able to do the work i would build everything yourself to keep cost down
half the cost of building is labor, you can cut the cost of your building in half by diy
first thing i ever built was my home in the mountains of north carolina
the second thing i ever built was my shop on the same property
around back