extra knowledge.

Hi, I have a school project for my economics class, I have to create a business idea and present it to my teacher as if he was a banker and i was asking for the loan. I already have the business and a product to sell, the only problem is that i have never seen something like the product i want to make, I know that I would like to just have a factory and then a online store instead of a physical store, then just pay stores to keep stock of my products (ex. walmart or target). I need to know cost material, employees, marketing, and factory of course I am still looking around and trying to find all the correct info, I just know that asking here may be my best bet for finding accurate answers from people who have already done the work and been through the process, because I would really like to make this a concept into reality because I know it is actually an amazing product, and if you need more info of what the project is please feel more then welcome to reply if you are able to help me out with this, I really appreciate if you have read this far, thank you!