I have a three acre pasture which I don't always have time to keep up mowing with my zero turn (Hustler Raptor). What would be a pull behind mower I could pull with the Hustler and handle growth that can be 2-3 feet tall and thick in some places?
DR Brush mowers are about the best you'll find for that short of buying a tractor. They have multiple models depending on what you are trying to accomplish, but they aren't cheap.
I've seen some pretty nice looking pull behind powred decks, but never used one. I have a 3 blade PTO powered pull behind that does better than a shredder on tall grass because the blades cut through the grass instead of trying to beat through it.