I really doubt a k-lab can be properly operated - other than testing the mechanics and software - for fewer than a hundred rolls. Maybe two hundred. But I might be totally wrong.

But for a hundred rolls you could probably cut the cost 50% or maybe a little more.

Pretend for a minute that you "can" run 100 rolls at $100 each. How much stock is out there? And how much would actually go for that reduced rate?

That's a prolab rate, not a hobby market rate. And the pros have all gone mostly digital.

And what if my educated guess is wrong by 20% on both - a real possibility - so the k-lab needs 120 rolls at $120 each.

Remember that Kodak freely released all the patents and knowledge required to the public domain many years ago. So for free no one picked up the ball.