I think you first need to research and develop a viable business plan. I think finding a solution to automate the cutting of prints is a n insignificant problem to solve. Are you actually trying to compete with local pro labs? Do you have any idea about what this would entail in research, knowledge, time, and money? I am not talking about technical knowledge here. Also, why would their customer use your service instead of an established well proven photo lab business? I will give you a hint: it has nothing to do wth using "quality" inks on "quality" papers.
All I am trying to say is maybe, just maybe, you need to spend more time to think this through. If I have offended you in any way, I apologize. Personally, I would find a better and more viable way to make money.
Bob