It sounds like you love cheer, but in all honesty, the logistics aren't looking too great. Whether or not you go back to HS, I think you should tell your coach what really happened.
@SL&AM is totally right. Coaches and teachers talk and if one of them thinks you are a liar, it could hurt your reputation for joining other sports/activities. You don't want to be that kid who people think they can't trust. I understand your reason for not telling them though, and they might too considering it's a personal matter. Own up to the fact that you lied and ask for forgiveness.
Back to finances/time management though, you have to ask yourself if this is going to be a huge personal strain for you. You don't want to put yourself under pressure that will ultimately be too overwhelming. Be realistic.