I'm a 17-year-old with a dream, but without the money. ADVICE PLEASE!?

I'm a junior in high school and I really have big dreams for myself. I want to be a private practice psychologist and plan to go very far in school to make this come true. This summer, i want to do an internship with Career Explorations in Chicago for psychology. the only problem is, the tuition is almost $7500. the latest i can have this money by is March. Unfortunately, this is no where near my single mother's price range & with the economy where it is right now, teen jobs are next to impossible (i've literally been looking nonstop for a year). I need help/advice on how to the raise money, and fast. Please, tell me anything you think is helpful!