I need to hire someone to mow my pasture (get rid of all the ryegrass which is going to die soon). I found a guy who charges $30/hr. Does anyone have any idea how long it'll take? It's mostly flat and rectangular, but with a wonky fenceline going through it, which will take a little extra time to get around. Any idea? Oh, and I imagine that he has a mower that is a minimum of 72".