Thanks for the response!
Sorry, I guess I should have clarified a couple of things up front.
First off, the tractor is a viable option in that it is similar HP to the mower and it has FWA. But, I'm sure the loader would have to be removed in it's entirety, thus rendering it unavailable for other uses for the duration of the winter.
Second, my other motivation for wanting to use the mower is that I did find a Jodale Perry cab for the mower at a stupid cheap price. The cab has a heater, AM/FM/Cassette, and all kinds of lights. Plowing with that would be way more comfortable for the operator (ME!).