Im experienced at developing presentations communicating startup projects to potential investors. Do you expect your customers to pay monthly? I would suggest developing a chart displaying different rows showing if x amount customers purchase your application this is how much net profit the company will generate per month. Showcasing one column # of users & a second column net profit would be a great start. Showcase your projections for the next three years using the same flow. Factor in ALL of your expenses to display net profit including hosting, fees, maintenance etc. Outline inside your presentation the percentage(%) you are giving potential investors. Communicate their Return on Investment and at what point they would break even(Break Even Analysis) . If you have any questions I will be happy to answer them on a call.