When you aim to things you can not afford , its fantasy. Do you know the cost of cutting four gear from steel , align at a base and rotate them when you are feeding the film with many other gear train. Its hell of money
Indeed. The owner of a company I used to work for would tell his customers "you can have anything you like, whenever you want it as long as you can afford it".
I wouldn't expect a small scale home emulsion coater to buy the parts for a rotary die cutter. I would do it with a miniature version of a paper hole punch with pins to register the cut to the previous cut holes. This would be very easy to set up.
Steve.

Not sufficient success (I am at the stage of getting a workable black and white emulsion to coat glass but still need to work out hardening). It is hard getting access to knowledge with our own photochemical industry destroyed in the early 1990s