In the state of Minnesota, how much money must a business make before they need to have a Business license?

The amount of money that you earn with a business does not determine if there is a requirement for a license. The nature and location of the business determine that.  You should find a good accountant or business lawyer, or both, to help you establish your business.  Many law firms, such as ours, www.joanisleenan.com , do not charge for your initial meeting to get you going and then don't charge an arm and a leg as you get the business going.  I know the CPA firm we use is like that too.  They know that if they help us grow, we will need them for more things and that is a win-win.