I haven't previously calculated. It's not cheap, when you factor in the cost of the .STL file ($50), the printer ($229), the resin ($40/L) and the curing kit ($29). I have other incidentals already in my modeling toolbox, such as brushes, tweezers, needlenose pliers, flush cutters, sprue cutters, and palette knives. I built a stout workbench (photo) for my other tools, just to have sufficient work space for this printer, but used materials I had on hand from other project surplus. Software that I'm using for supports and adjusting the file is freeware, although I have a student-level subscription for Fusion360. I have used about 2/3 of a liter of resin to get this far, but have printed a small miniature castle, and the test cube, plus the 3 rejected bodies due to misplaced supports. The idea was to buy the setup because Shapeways would have cost the roughly $350 I have invested so far to do 18 cars. I might not get all 25 out of this bottle of resin, but the investment will go further once I finish the fleet of 25 and can be printing stuff for the kids, layout details, etc. Long story short, if I only get 18-20 cars out of this bottle of resin, including the other prints, that $350 figure is spread out to under $18/car. This doesn't include paint, and custom decals, trucks or body-mount couplers. I never said the project would be cheap, but it'll be worth it!