NoGround, thank you for bringing this up. It has been on my mind a lot lately too.
I am not keen on leaving AS totally out. I can see how he would interpret it that I never cared about him and it would drive a wedge between him and his brother forever. I also know that I cannot possibly give him access to money that will certainly let him spiral downward quicker.
I have toyed with linking it to his recovery, but as stated above, how would one ever know for sure? I like the idea of giving it to him when he turns 50, no matter what. I also think I am going to build something in that the money may be used to pay for his children's school fees if he ever has any.
There are lots of good food for thought brought up.