The crowd funding example makes an excellent read - thanks both for sharing.
Having said that, I think some of the figures are way out. I know this is US, but typically a 20ft container to Ireland costs €1,100 and 40ft box about €1,500 (as opposed to $5000 - maybe they were located in the middle of the US, and needed road haulage inland). 25% fees for credit card and spurious expenses is also very, very high imo, but that's the retailers problem.
Taking his manufacturing costs as accurate (including tooling, CAD, assembly cost per unit), then a 2, 000 run of, say, a brake van, would cost around €40 per unit. By my rough calculations.
Would you a) sell 2,000, and b) what could you reasonably sell them for?