Sounds like you’re prepared to be full pay (less any merit) for Years 2 through 4. Just want to caution that your need-based aid for Year 1 may be pretty insignificant.
As the previous posters pointed out, even an extremely low FAFSA EFC at an OOS flagship can mean little or no need-based aid. For example, Penn State or Clemson might give him $5,000 in need-based aid in Year 1 based on that <$1,000 EFC (and then zero need-based aid after). That’s better than nothing, but it’s about 2% of the total cost for four years.