Snow sticks on the roof as long as the inside temperature is within a few degrees of the outside temperature. Once the stove is lit, the snow may start to melt, but from the bottom up.
I designed and built the building in the early '80s. It's 21' long and 10' 6" wide. Inside it's 21' long and 8' 3" wide. It's first use was as a boat house, and it had ramps and a winch to use in pulling a boat on a trailer up inside for storage. Last summer, I sold the long unused boat. I put in a new floor, a woodburning stove, some old Andersen windows I had, and I ran a 20 amp service from the house through a buried Schedule 80 PVC conduit to a sub-panel in the building and wired the building.
As far as tools go, they are all in our de-humidified basement. They aren't as rugged as my friends are.
The only thing of note on the walls is the 21 inch rainbow trout one of my friends carved and painted.