So the story of this is pretty interesting, I know a family that owns a private ski lake near by and told me some details. The lake that Kelly Slater used for the wave pool used to be Sunrise ski lake, it was a ski school. When the owners decided to sell, Kelly picked the lake up. The lake then was drained and the whole floor is covered in concrete. The power for the machine is borrowed from an air base miles away. There is a 10 foot wall around the whole property. the whole lake project was about $5,000,000 I heard, that doesn't count the research involved before hand.