You have chosen schools which have very low acceptance rates. Many qualified candidates are denied admission. You have a chance, but if you really desire to attend boarding school, I would try to convince your parents to expand your choices of schools. Many schools offer fee waivers to those needing a lot of financial aid. I don't mean to be the "Debbie Downer" here, but every year there are some students who don't get in to any of the schools to which they have applied, through no fault of their own. This outcome can be avoided most of the time with better planning.
Good luck to you! Get those applications started, and make the appointments for interviews.