Something like this would never happen in the league now unless the whole team purposely tried to make it happen for the player. Even then it would be tough.
Basically, they would tip all the rebounds to him so he would get credit for the boards. They would shoot it every time they got it from him to give him the assists, and keep trying until it was done. It wouldn't happen in the context of a truly played out game.
his career high of rebounds is 16 ( he's done it 3 times ) if he did all of them 16 rebound games in regulation time, what is the game went into double over time or something, he could get 20 rebounds in that time. IMO if he really wanted it, he could get it.