If you completed a FAFSA, you should have received a SAR (Student Aid Report). The EFC is clearly noted on that.
But more important…so the net price calculators for ALL of his colleges. The FAFSA EFC will be the MINIMUM you will be expected to pay each year. None of these colleges meet full need for all.
You mention some health issues. He will need health insurance in another state if yours doesn’t cover him in other states. Please check that because this could add a couple thousand dollars a year to your costs…and travel too.
Has he applied to any MA public universities? You are instate for those now…right. maybe UMass Dartmouth?