Fellas, just got my blacktop HEMI

)))))) so now,the dilemma.
Originally I wanted to order it, get the car in April and find police wheels used on the cheap but when I saw the car, I pulled the trigger... now I got about 2 months of winter left. I'm in North East NJ, not Canada by any means but I read that the 20'' firestones are not great in the snow. What are the realistic possibilities of getting the winters used in the spring?
Thoughts on just putting 100 pounds of sand bags in the trunk for the time being ( when snow is expected) and wait for a deal on the police package? 700 on ebay is kinda expensive for wheels, no?