I don’t know of any greens in Ontario that are using that type of mower. The only one I have seen was at Pinehurst NC. When I discussed this with the greens keeper he said the biggest problem was getting into the corners. He still had to use the walk-behind mower to cut the corners.
I don’t know what the cost would be for a riding mower but In my estimation it is not worth the money to buy one.
Hope this helps. If you have any more questions let me know (or post a comment).