I have a thingy called a scythe mower. It is basically a two wheel tractor/ rotavator unit which you attach implements to. One such implement is a scythe mower, this will chomp through docks, nettles, thistles and brambles. A bit like a hedge trimmer bar at ground level, with 9 hp behind it. Often called a power scythe, sickle mower or finger bar mower. My neighbours laugh when they see it dragging me through rough patches, but I have slowly reclaimed lots of new grazing and tidied the place up. I am also for hire with said beast within a short distance of home.