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Yes to all of the above.
A bit more expensive than some of the other training weekends, and yes, it's a successful business venture for the organizers....just like any Spring/Summer event.
But IMO, the training/instruction is top-notch, and the level of competition is very high. Both are better than most anything else you'll get on the East Coast in April/May.
So if your kid gets the invite, and you're looking for that type of thing, I would send him.