If I could just live with what I have it could be a cheap hobby...but, I never used to hike in winter, but now I do...the big snowshoes I had were not good for alpine stuff...oh yeah, better get crampons...and damnit - you need an ice axe...
The thing that is getting me now is ultralight...just got a great pack that weighs ounces and will need to get a lighter sleeping bag, etc...
At least I do not usually eat out...and our cars get decent mileage...