100 miles per week for someone with limited time is good. My part of Rhode Island, being near the ocean, is relatively snow free and we can ride most winter days. Many people in the bike club have a winter bike with wider tires and fenders. There must be bike clubs in our area you may be able to tap into for ideas to allow you to keep riding through winter. You might also check into the regional sub-forums and ask for info there. Papa Tom lives out in Long Island somewhere.
Long Island: Good Ride Today?