I wish you great success. I don't have a lot of advice. Starting a business is rewarding and difficult. I suggest start by marketing and meeting with your friends about your business. In the beginning, you will need as much support as you can get. Then meet with local shops and stores that might give you shop space on consignment. If you buy the equipment to customize the mugs, consider adding an advertising message for a local business so they can give the mug to customers as advertising and a gift.