EvilPanda, We already have an endless Wind and Wave machine in WA called a Seabreeze. It's just only available at certain times, but no need to book, or even pay.
When those white caps start showing, and the wind starts blowing, it makes a joke of any kind of artificial wave. The troughs and peaks offshore can be HUGE. WAY bigger than a wave tank. The near shore waves are just a bonus.
Somebody should make a website about WA's awesome Seabreeze. Get onto it Laurie

The Wave tank would just be a supplement when there is no SeaBreeze.
How cool would it be to just watch the slaughter of 192 people at once in an 8 foot wavepool with 3600 waves per hour, live band playing under lights, sitting in the elevated beer garden eating some nice food, with your hotel or chalet rooms nearby.