You are in high-school, and as I understand it you have been in high school for 2 years, meaning that you are of age to get a job. Now, it would suck to work and go to school, but if you lose saxophone, friends and computer, what would you have to look forward to by going home? So if you are honestly that poor, be a bagboy at a grocery store. Or work at your nearby donut shop, I assume that might be pretty non-horrible (for being food service).
So, according to your profile, you are 15. If this is true, disregard the above. If you are 15, then I don't really know what to tell you. You might want to turn to religion to help you.