Kaos, maybe you should start by printing to a specific market that would buy the clothes that YOU like (like a labor of love!), or something that is big in your area. For instance I started by printing for local college students, they buy **** like crazy if it has our UofA colors or logo, or something to do with UofA.
Do a little research on what type of customer you want, say if its someone wearing high priced premium apparel, or standard logo on a shirt. I would also suggest hitting up apparel conventions, you just missed out on MAGIC, they have a ton of brands get together to showcase for buyers, and you can learn alot about trends and potential target markets.