Cool idea, perhaps it can be submitted somewhere, and then the devs can pick a weekly 'Community Challenge'.
this sounds like a bad idea because the chances of your challenge being the community challenge are so low, i also think this would never happen because the devs want to control the economy of the game and not have you earn rewards too fast, but its a great idea and id love to see it happen, maybe a good way to implement this would be to add it in with custom parks, either a custom challenge browser alongside a custom park browser or allow people to add challenges to their custom parks, this would also be a good way to get people playing more custom parks when they finally add them
