Really cool idea, but I think a flat-cost of $3,500 for a prototype is way too low and the approach is error prone. How about iteration? Iteration is one of the

Really cool idea, but I think a flat-cost of $3,500 for a prototype is way too low and the approach is error prone. How about iteration? Iteration is one of the key factors during the prototyping process. Does that $3,500 figure cover only one iteration or the initial development and consequent iterations? Or does a company/individual have to pay another $3,500 per each revision?