Anonymous wrote:OP, all three are very good schools. Both Lowell and Sheridan send lots of kids to GDS, so you would have a good shot at ending up at the same place for high school no matter where you start. Since financial aid is an issue for you, and admissions at all three are not a sure thing, your best bet would be to keep an open mind about all three, apply for admission and financial aid and then figure out what choice is the best for you. Even if you decide now that you like one better, it would not be worth turning down a better aid package between the three and you might not get into your first choice.
+1000
If FA is an issue you literally can't afford to get attached to one school. I was completely surprised by how much FA packages differed among schools. Apply everywhere, and then pick among the ones that are serious about meeting your need.