Very few people are willing to spend more money than me at Disney parks, trust me on that one
What I was referring to was a $300 per day per person fee as Brayden suggested (for a family of four for a week that would come to over $8,000 just for FastPass). That is so exorbitant, even wealthy people would pass. And the ones that wouldn't you could count on two hands.
We have proof of this: the club level FP+ test failed miserably. Just not worth it.
Anyways, $250-500 for a week per person, I would be on board.