Wilcap Slant Six to 200R4 conversion

I can see where the owner wouldn't want to do a run if kits from the last one languished on his shelves for a while. You can't stay in business long with product that isn't moving tying up your investment capital.
That said, the .org guys are talking about a group buy with 10 confirmed orders. If that's the break even on a run and there's profit in it, the owner is allowed to change his mind.
If he's doing it right, it shouldn't languish on his shelf at all. Receive order, build kit. I'm guessing he's not CNC, or this would be cake for him.