I hired a local guy with a tractor, he had to cut down a few inches on the high side in my rocky soil, then brought in some rock-free top soil and spread it out, then compacted it with a different piece of equipment, back and forth. He had it to within 1/4" level. Sloped all the edges, all the way around. I let it set for a couple of weeks, it would rain and I had a tiny bit of water right in the center, but none was running off any side. It was worth the money. I'm 55, I've had 11 abdominal surgeries, and I adopted a little girl who has turned out to be a water bug. I had to hire help to do this, and I'm happy I did. The guy I hired builds driveways, ponds, building pads for structures. He worked in my little project on an off day; so look for someone who does those kinds of projects.