Why not buy a stander? The velke or sulky attachment would be great if you buy a walk behind. I've never owned a walk behind. We only have standers and push mowers. I was scared when I bought my first stander
(36" wright stander). Thought the price was too high and didn't think we needed it (not enough big properties). It was the best decision I ever made in this business. No doubt! Get an attachment or a stander. You will not regret it. Toro walk behind or wright stander IMO. Speed and quality of cut is unmatched with a reak commercial mower. And not having to walk all the properties all day keeps you or employee(s) energized and happy.