Can someone help me find out how I can remodel my room on a budget?

I really would like to remodel my room a tad. I'm very into Aly & AJ. I have about 6 posters. I want to make it more muchir & vintage than it already is. The walls are a some what of a vintagey/vibarant green and the furniture is black with stress marks for a cool detail. The bedset is black, gray & white with hints of the same green of my walls. I need space to move around and I need to find the right layout for my furniture. Please rsvp(respond sil vous plait). Thanks!