My wife and I hired goats from a gentleman on Nextdoor to help clear our backyard in our newly purchased home (like ~10000sqft of overgrowth) - he dropped off 7 goats, and they performed admirably, were extremely calm and well behaved until they ran out of food, at which point they turn into food-hunting, petulant children. If you do this, make sure to get only as many as you need!