Imho you need sliders, like Heroku.

But that's just my gut reaction. What you really need is a webdesigner who can lay down an approachable visualization for such a complex pricing scheme (which will probably involve sliders, and also big honking tooltips).

As for your actual pricing - I don't know. It wasn't obvious from the page what a small/medium/large deployment would cost and I didn't bother to fire up excel to figure out a number that you should absolutely spoon-feed me.