overwintering

I just recently purchased this Stricta for 49kr (5usd?), and it is my first 'proper' foray into bonsai (I have a green carpet juniper I have only repotted and a ginseng ficus). I made a training pot for it, but will wait for spring to transfer. And I will clear the soil that is currently...

I've debated a ton on how I'm going to overwinter my Juniper Bonsai. Leave it in the pot on the ground, buried in the ground, the garage(I thought this would kill it, but I guess it can be done) and finally use my egress window. I felt the egress window would be best, as it would keep the snow...