If I were to ask someone to make Kodabromide paper for me in their facility for example, I would budget a minimum of 1 year, perhaps 2 for the project and a minimum of $100,000 US before the first usable product went out the door.
This assumes they have a full facility and I have a workable small scale single grade formula. It also only budgets for just the one contrast grade. To do more would require more time and money. That is what I would plan on with the expectation of having a good staff and lots of luck. With a good staff and luck it would come in sooner than that.
Everything that failed would teach, but would be nothing but scrap.
That said, a box of 100 8x10 sheets selling for $50 / box retail would take a lot of boxes to pay for the initial investment, interest and etc.
Hope for the best, but plan for the worst is inherent in what I have said above.
I must add that that time scale does not allow sufficient time for real world keeping exposure and processing tests, and a lot of other ancillary real-time testing. It would be going out the door with many parameters untested or partially tested.