Seems to me you should only be applying to schools that offer merit…or your in state. You are draining finances and leaving little for the next siblings. That’s a lose lose. Your parents need to afford life. Your siblings will no doubt want a chance.
It may be too late for some but the WUSTL, Emory, Vandy, Duke and more do have merit opportunities. Or try a second level school that will love to have you like a Rochester, CWRU or Brandeis.
You could go to Arizona for near free tuition. Get in the Honors College. Miami of Ohio would be aggressive too. With your background, faculty may take you under their wing and as @eyemgh said, you will be successful because of you, not the school.
Finally, look at Washington and Lee Johnson Scholarship. It’s a great school and a total free ride. You have 10 more days I believe.
Crushing your family financially is never a good move. Who knows, you may become a multi millionaire or even billionaire. But even if so, you’d cause many years of strain on your family plus you will, depending on how far behind your siblings are, potentially severely limit their options.