This is 100% the correct answer. OGE consignment is the way to go. Head straight downstairs when you get there. They don't rent though but you'll likely find great deals on a secondary ski outfit.

BTW, great timing on your trip, with today's storm.

If you want to actually drive to Mass and take public transit into Boston, you could park at a public parking garage on the commuter line in. Eg, park at the Lowell station and take the Lowell line into North station. I have no idea what the "real" availability of parking is at these places though. https://www.mbta.com/parking/stations-and-rates

There's a megabus that goes Burlington --> Montpelier --> Boston, but it only runs on Fri and Sun currently: https://us.megabus.com/route-guides/burlington-to-boston-bus

There's also Greyhound, though it's a bit more expensive: https://www.greyhound.com/en-us/bus-stations-in-vermont

There's also the Dartmouth Coach from Lebanon, NH to S Station in Boston. Reasonable price, lots of trips per day to Boston. You still have to drive to get to NH, pay $5/d to park your car, and pay for the bus itself, but it avoids the driving and parking headaches in Boston: https://dartmouthcoach.com/route/upper-valley-to-boston-logan-airport/

An alternative to the Dartmouth Coach is Concord Coach lines, but you have to drive the longer route to Concord, NH: https://concordcoachlines.com/route/northern-nh-to-from-boston-logan-airport/