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.
But then there's a possibility that he can go to free agency (if a player stays on a team for 5 seasons, they automatically go to the TL for free agency, which will be hard to get when they're at that level.......that's why in s22, I'll be saving up to keep Colelong)