I think the problem is that they have a very small team, and any peripheral activities not directly related to their core tasks are, unfortunately, a distraction. Although it would bring in money in the long term, in the short term it'd be taking away valuable resource from getting P30 up to full production, and ironing out the colour reversal issues..
Yes, I think Dave Bias already mentioned that first the team will make sure P30 can be consistently produced, and then they will turn to color.
To be honest, to make any film you need to sort out all the problems that Film Ferrania has had to sort out the last months and years:
- having electricity, water, steam, air conditioning, cleaning (and removing asbestos)
- having film conversion equipment (including creating the magical 120 backing paper, making 35mm film cartridges)
- servicing all machines and laboratory/measurement equipment to make sure they work correctly and they measure correctly
- cleaning ALL things that will hold emulsion or emulsion chemicals
...
and only afterwards, coating actual film should be comparatively easier (less time and resources involved). And they already have the slide formulas and chemicals (as far as i know); of course, one thing is to make the film using the chemicals in reserve, and another to re-engineer the film so production can be sustained continuously.
My two cents.