I want to make my own t-shirts

i want to make my own t-shirts. I designed 4 single color t-shirts http://www.rocketinnovations.ca/t-shirts.html i just want to print 1 of each. When i called screen printing places they said there minimum quanity is 5ish, otherwise it would cost $100 for one shirt. any ideas how i can get these made? i tried this http://community.livejournal.com/craftgrrl/3674467.html but it turned out too sloppy.

Can you use iron on transfer on colored shirts?

anyone have any ideas?