I am sorry about your sons injury.
You actually had me until you got to the draft part. Really, are you kidding me?
Have the surgery asap, make sure you have a legit guy do it and a legit place for rehab. Your son has all summer and next year to get into shape and explore options, that should be the priority. Don't take a PG year unless he is advised to by his academic counselors or someone who can guide you through the process because you are all over the place.
Good luck.