I cant think of any school that a 3.2 GPA kid could get into that would give more aid once a sibling is in college. Very doubtful he’d get more aid with two in college.
How much can you pay each year?
How much can you pay each year for each child once they’re both in college?
Most schools will not figure in foreign travel costs or health insurance costs, so when you look at NPCs, figure that you’ll need to budget paying another 4-5k to cover those costs as well.
Does your son have affordable options in Spain?