Huh?
Although there are probably people on this site with more info than I have, I seem to recall that if he does any schooling at all, he will be disabled from seeking a 4-year scholarship. That said, he can seek a college program scholarship and some even become available mid-year. Alternatively, he can have a "gap year" and reapply, I guess (since he is still younger than 24), but sitting out a year does not seem to make a lot of sense to me. I have no idea how a board would look at that.
Have you spoken to his no. 1 school to see where on the wait list he is? Because of USNA acceptances and people moving on admission wait lists to more prestigious schools from lesser ones, something may open up. I also think an alternative is to do freshman year at No. 3 and transfer after a year to No. 1, taking his scholarship with him.
Others?