On campus, are there any spaces available for businesses to rent? If so, I'd look into that. Much of your expenses will be paying for your space and getting city and state permits.

But I think it's a good idea, especially if there are no coffee shops. You can even eventually sell magazines, pastries, and other things you'd typically find in a coffee shop once you're established.

As far as getting money...I say keep saving, look into borrowing from people you know, or get a business partner. I don't know whether a bank would give you a loan to start a new business, especially a restaurant-type business. But perhaps there is a credit union in the area, or an independent bank you can try?