Financial questions that need an answer

I want to sell t-shirts geared toward law enforcement, fire, and ems. I also want to supply local sport teams with t-shirt jerseys. I would like to start a web site store also and build it into a profitable business. I also want to make custom license plates. I plan on doing everything in house at first. I also cant think of a good name. I plan on using a computer to design the products and print them then use a heat press. I am grateful for any help given.