[mym1990]

"well the American alpine club has an average income that's in the six figures iirc" how do you even come by information like this? The lowest membership fee is 45$ and as you mentioned it filters out a significant portion of the climbing population. If you are using a charity that likely has multi millionaires as part of its membership as part of your generalization for incomes across the whole climbing population...I would consider the possibility that you are way off.