This pump is pretty strong. I have a couple rises, and then flat for 200 feet. I don't get close to 2000gpm, but as long as you're not putting out a fire, it's a lot of water. It's certainly better than hauling water from the creek in a bucket.
Hauling buckets gets old fast, plus it’s hard to not leave a trail.
I haven’t used a bulge pump rated for 2,000gpm, seems like it was a 500 or 1,000 I was using before. To get that advertised gpm it seemed like it needed to flow downhill or something in my experience though.
I use a 1/2 hp well pump and it’s only rated at 7-8 gpm, so how they can claim those numbers is mystery to me. I know in a boat situation there isn’t much of a lift, but that’s about the only difference I can see.