I would answer the following questions honestly before you plump for spending money on winters:
1) do you actually have to drive when it’s very snowy? Staying at home for a few days a year is a good option if work allows
TRUE
2) How skillfull a driver are you. If you have good skills and can feel what the car is doing, and have good forward planning and observation, then you can get along on std tyres tbh
FALSE
3) How much traffic do you drive in? For me, winters do not help me get to work, because everyone else is stuck, causing gridlock!
TRUE
4) Can you put some weight in the boot. The only reason a bmw is less good than say a focus is the fact it has less % of its weight on the rear wheels. a couple of slabs, or some bags of sand makes a suprising difference
FALSE
5) prepare yourself: snow socks, jack, towrope, and maybe some old bits of carpet can get you out of a pickle!
TRUE
Just my thoughts but probably TRUE