I would be careful putting a plow on a smart. I would guess the traction control would go nuts, and not sure there is enough weight there to make the plow work, and the weight of the plow could be an issue. but that being said, anything is possible. Make sure the structure that mounts the plow can handle the load and strain!
I would think an ATV plow might work out as long as it was for light duty, stay away from plowing parking lots.
2 dealers in Ohio, 33 Recreation in Rockford, and Kuhn Sales in Fostoria.