When customers began showing up at his house all hours of the day and night wanting to order shirts to be printed, Travis Alexander knew he had to do something. His home-based business, Shirt Mayne, needed a home of its own. Turns out he did not have to go far. He found a space in the Northgate Mall, not far from his home, where he and his wife, Marinthia, could open, which they did in November. Business was good enough to allow him to quit his day job as a land surveyor. The location has worked out so well for his business that “they’re going to have to run me…