One should remark that the price of your services does not depend solely on how much value you're providing. That value is just the upper bound of what you can charge. The other factor is what somebody else would charge to do the same service (it doesn't even to be a service of the same value, just a service perceived to have the same value --and people are notoriously bad at estimating that value in software). That's why in practice consultants find it impossible to increase their rates above market average unless they have a very strong brand.

I would certainly be curious to know how much patio11 is really making from his consulting business. It sounds like he would be making at least $300,000 (a lowball estimate of $x0,000 would be $15,000, and a lowball estimate of how many weeks he works in a year would be 20). And possible up to $1.2M (40 weeks at $30k).