I've been away for a while, but I still don't think you can measure potential in directly in skillpoints.
Yes, it may be reachable in some combinations -- I just wanted to point out that 1 skill point in, let's say, rebounding, may have much different effect than a point in driving, depending on player position.
Anyhow, this guy is kind of shot -- so I suspect training up his inside skills may take a while. I'd do the outside program as you have it planned, then add some passing and rebounding -- but that's just me.