^ I think it’s less as an expat American than if he applied as an international - some universities slap extra fees onto the internationals’ bill.
If he natively speaks Spanish, yes he’s Hispanic (people with Spanish roots also “count”).
His best shot really is at LACs since they want more boys and Hispanic would help. But 32-34 in IB makes things harder - have you posted in the “B/B+” thread?
http://talk.collegeconfidential.com/parents-forum/2018547-parents-of-the-hs-class-of-2019-3-0-to-3-4-gpa.html
He should really take the SAT AND ACT in June to have a baseline, then prep for the one he did best in, study all summer, and retake in September or October depending on the test he did best in. He needs the highest possible scores by the end of November (ie., November tests are the latest he can take his 3rd attempt). His scholarship is likely to depend on the test.