Generally I’m not a fan of students graduating early, and am not sure what is driving OP’s decision. With that said, the schools on OP’s list are used to seeing pointy candidates, some of whom graduate HS in three years (or less).
It seems OP’s bigger issue is financial, and I don’t understand what their budget is, nor if the parents will even fund an $80K school at full pay.
I agree with other posters who have suggested merit hunting, limiting debt and not putting OP’s parental retirement in jeopardy, and also leaving funds for the younger sibling. It would be helpful if OP ran the NPCs of the schools on the list and let us know those estimates, and what their budget is.