James (and wronj) just bumped another thread (
link) for you where this was discussed and the FAQ referenced.
Even if the RS goes ineligible, he will continue to practice and improve during his freshman year.
If he goes ineligible, there is at least some forum wisdom that he will require more SH in future seasons to stay eligible, though I haven't had experience with that, so cannot confirm or refute.
James, I'd start your guy at 0 SH and submit a ticket to support asking about the future SH needs (word it carefully) so you know by the time the first grades come out whether you'd see any benefit from keeping him eligible. Oh, and if you'd be so kind share any feedback you get with the rest of us.