You can get sponsors to boost you depending on how good you are. You need to convince them that you are the best so that they can give you money. You can also look for a job depending on your interest.
Are you talking NBHA? Are you 1D area or? Talk to local feed and tack stores about sponsorship, also local businesses in your town. You will have to show some of them more that "I am a good barrel racer" though. Try some local shows, pretty cheap entry fees, and you get something to put in your portfolio, so to speak. Also look at a part time job someplace.