So no, you don't have the fee schedule; instead, you have QuackWatch's assertions about what Clark charges, plus the hearsay of an acquaintance.
This is an acquaintance who allegedly went to Clark's place, without cancer, to seek treatment, ... and paid $12,000... and more... to be... cured of... what, precisely? Was the ailment this person went in for addressed or not? The "cancer" was allegedly "cured", I get that. If the person didn't actually have cancer, but was so diagnosed, and then was magically cured of something that he didn't actually have, I would agree that this was a scam, pure and simple. But what I want to know is what was this person originally going in for, and did Clark's efforts help at all?
Personally, I find the whole clinic setup silly. You either follow the directions or you don't, and you don't need to go to a clinic to follow the directions. But some people want to have their hands held, I guess... And "treating" people who aren't willing to make the changes necessary to eliminate the causative factors behind whatever ails them [think of an alcoholic who won't stop pickling his own liver] is a recipe for "scam" claims, because health isn't something one can have forced on one's self.
BTW, what are these other clinics you speak of? As far as I know, she only has the one in Tiajuana. Names, places, other details, please. And some proof if you actually have it.