Pretty sure he had a two weeks period to hit it and got fucking unlucky on the weather. He had like rain, fog, wind and all the shit you can think of. The reason why he decided not to risk it in bad conditions might seem hard to understand considering the cost to build it but let's not forget that in his 10+ year career, he NEVER got injured. That's not something many pro skiers can claim.
That's the video that explains the whole Treble Cone story. And it was the day with the best weather...
And concerning the Nine Knights setup, I have no clue how much it cost but I'd say it's the nicest feature I've ever seen. So many possibilities. 2 big fat hips, on huge jumps, quarters and rails.