When I produced ship kits (Accurate Image Models) it was a single person operation, here was a sample of the process.
Choose and research your subject. Buy books ($$$), buy plans (more $$$).
Buy materials ($$$) Build your master. Not quite as simple as scratchbuilding a complete ship, because the parts have to be broken down into 'castable' components. Average time for a cruiser was about 400-500 hours, including research. Once that's complete...
Design the photoetch fret, draw the tooling, send it off to film (more $$$), get it reduced, then produced (more $$$$). Once completed and returned, you need to cut the frets down and inspect to make sure there's no burns or short shots.
Buy a compressor and pressure pots (lotsa $$$$). Buy rubber, usually in 5 gallon buckets (more $$$$). Buy resin (more $$$$), and mold release.
Have I mentioned that we haven't sold anything yet? :-)
Build mold boxes, and pour molds. Open face or squish molds can generally get 50-60 pulls if the part isn't too aggressive. Typically, I'd get 30-40 pulls from a 2 piece hull mold.
Cast all the parts...pour resin, try to remove as many air bubbles as possible by shaking the mold box at a high frequency. I'd take the mold box and rest it on an upside down orbital car waxer....then put it in the pressure pot, and seal it. Fire the compressor and put 125 PSI into the pot. Allow the resin to kick...drain pot, pull mold, try not to destroy parts in process. The above mentioned cruiser typically contains about 300-400 parts, and your average 8x10 mold can handle about 6-10 larger parts, and 20-30 smaller parts in a gang mold.
Once you have all the parts cleaned and packaged and organized, ie., 3 bridge parts, 3 turrets, 9 barrels, 4 fire control directors, 28 life rafts, etc, etc., you can package the kit...oh wait, we needed boxes (more $$$$) and some kind of printed label (more $$$, either for ink and labels or for someone else to print them).
Draw instructions, and print...6 to 8 pages on average, per kit. More $$$.
Then you add up your invested materials... Then you take that number, divide it by 100. That's your actual cost per kit...add in a profit, and there's your kit price...
If you invest $2500 in materials, (taking into consideration you've got a compressor and pressure pots already), and make 100 kits, then your kit cost is $25.00. Now take the hours you've invested, roughly 1500 or so to do the 100 kits and all the pre-production stuff. That's 15 hours per kit. Add in the cost of advertising and marketing these kits.
This kit would typically sell for $180 retail. So, after all is said and done, I'm making about $155 profit for each kit, or, about $10.50 an hour.
Now, that sounds like great money, but the truth is, you're laying out alot of cash on a subject that's not going to sell all 100 overnight. Truth is, it may take a year to sell 100 cruiser kits at $180. Then you must consider what your next kit is, and where that money is going to come from...usually, from the profit you make on the first one. So you see, you can usually pay back your materials rather quickly, 10-15 kit sales, but after that, you take that money and hold onto it for the next project, which, by the way, has just started this God-awful process all over again.
Did I mention that you do this in your garage, AFTER your real job is over??
That's why resin kits are so expensive. We touch every part that goes into that box.
Hope this helps explain things...
Jeff Herne