Drum mowers are used by farmers around here to cut fields of alfalfa, or Bermuda for hay. Usually mounted on the back of a 3 point hitch on a tractor and pto driven. It leaves the stalk long for baling. I doubt many lawn pros have much need for a drum mower. And yes, I bush hog our horse and cow pastures. I also bush hog cotton stalks aftr the cotton is harvested to prevent boll weevils. Most on this site don't use larger farm tractors. I guess there are probably smaller drum mowers, but there wouldn't be enough need for a lawn pro to purchase one.