I am sure there is some do and learn as you go to this, with a natural increase in speed as you repeat the process. But each hammer will be unique and require a lot of item specific points to get exactly right. Your price seems about what I figured maybe a little low.
People fail to understand jobs like this are both man time and machine time jobs. The steel cost is trivial. A 40K machine wears out, needs to be paid for and replaced so that must be figured as part of the cost. Is that machine a thousand hour life machine? If so thats $40/hour break even, no profit margin and no saving for its replacement.
It is interesting but Ill let you have the fun.
