My suggestion--snow blower. Plows work fine IF light fluffy snow or you have monster pushing it. Snowblower doesn't care. 5 HP large enough just make sure it is a 2 stage with speed to throw snow.
I have been into vintage tractors and equipment for a long time. And I have always done my own restorations. It's lots of fun and if you do it right you can make a little money. However, the two-wheel-walk-behinds are no longer popular for a good reason. They're too heavy and most of the time difficult to handle, they're too light for good traction in soft soil, mud, on grass, etc. Parts are sometimes hard to find or not available at all. Old ignition systems are often troublesome. Old carburetors are often unreliable.
Unless you are into vintage equipment like that and do not intend to use it as a daily worker I would not recommend the purchase. If you're not an excellent mechanic with tons of tools - double that last sentence.