I want a Volkswagen Beetle Convertible

You’re talking about getting the new one, right? Do not get the old (rear-engined air-cooled) version. If you’re getting the new (front-engined water-cooled) version, it’ll work fine in NH. You’ll be better off getting an extra set of winter tires mounted on wheels next fall. The Beetle does have its problems, it isn’t the most reliable car around, but if you’ve been wanting one for 40+ years, why not? It’s actually fairly roomy for one or two. Make sure you do not get one with the turbo engine, though, they are trouble-prone.