I am glad that you came back to clear up some things that you first posted. Obviously, quite a few of us heard you saying the same thing.
There is an issue though, your son has an injury that makes this already difficult journey more difficult. Therefore, perhsps you really need the advice of someone who has worked in this situation.
He has to get better to move forward and a very good PT.
I am not a huge fan of the PG year. But that's your dime and your sons time and should be used and considered wisely.
I am though, a huge fan of JUCO if it's a good program and feeds into good 4 year programs. We have great JUCOs here in FL, I am sure there are good ones in your area as well.