I'm afraid that if I get a part-time job it'll be the first step to staying in a dead-end suburb for the rest of my life.
If you get a different job, do you think that you can escape from this town?
Yes, and I really don't like my town.
It's great that you have big plans for your life, but if you're in need of money then you have to take the job that you can get now. By taking a part-time job, you can begin to save money for when you eventually leave your town. If you don't take a job that you can get now, then it'll be harder for you to leave as you'll be more financially-strapped later on.
I'm not going to get a job, I'm going to try to save money by selling my body on the street.
I have to strongly advise against selling your body on the street.  It is illegal and highly dangerous, so you could be arrested or even killed.  Besides, working the streets in your home town will just increase your chances of being stuck there.