Hi-- not sure where you live, but in Arkansas (remote ozark area) I was able to do it myself with the help of a friend. So the cost for me anyway was the cost of a rentable back hoe ($180), the cost of a circuit breaker, and about 300 feet of wire and outlet box at the pool! I think it was 12 gauge wire since it was a significant run. Total costs about $400 i guess. But that was free labor with unlicensed folks!

Good luck!

Mike