Of course you can!The key for you is to find someone who can manufacture them for you. Check out: http://www.wearlane.com/shopshirt.html - College students.You need a concept and an approach to good design. You need a hook that will move the shirts. YOU DO NOT need to manufacture them. Check out http://www.broken-arrow.com/ as an example. I don t know the best ones but I did a search and this company is an example. You can get an online quote for a number of shirts, choose the material, kind of process (Silkscreen embroider, etc) the colors etc and then upload your design. You get the shirts and resell em. It s about that easy except that it s all about people wanting your design.Anyway, yes you can do it. Given your questions, though, I d STRONGLY suggest before you start that you look around campus to see if there s a business club for people wanting to do their own businesses, or something in the community. You need to be able to understand how to design, promote and operate an on-line presence before you get much further. It s not hard but you could use some time with people who have done it to get their advice first hand as Answers won t help that much. If you can t find anybody, then go to the business school at your college and start asking professors! You ll find someone, I guarantee it.Hope that helps.
CafePress.com has an excellent program that can help you out. $5/month. Seriously. They re the biggest on the net when it comes to t-shirts. They even started running tv ads recently. If your designs are more than just a slogan or scree-printing, then the previous answer is a good one.