Interesting topic!
I always wanted to be an airline captain, but couldn't.

Various simrides and psychological interviews over the years (I'm 21) assured me that the problem is not having the "right stuff" or not, but that the problem is solely medical (I have about the same clarity of long-distance vision as your average apricot). Maybe that's this gentleman's problem as well.
I am currently in college pursuing a career in the flight simulation of big iron, and I also have been looking at the possibility of becoming a part-time instructor for some time now.
What is the possibility for me to become a typerated instructor without actually needing/having a class-1 medical or ATPL?
I promise I'll never call myself captain