He's indicated before somewhere that he is good with $1mm/year for operating costs (I think he said something along the lines of "If KA has $1mm/yr in revenue we’re good!", think it was in the Globe and Mail).

His lectures are hosted on YouTube (free) and he could crowd-source dev, design and QA. Also I think he is always going to be the only teacher - he seems to believe (not passing judgment here, just making an observation from what I 'sensed') that he's got a captivating charisma that people respond to, hence he’s best suited for conducting the lectures. I have enjoyed every lecture of his and think he has a point; he really is a good teacher.

Also, from his TED talk I got that his vision is a universal classroom - very noble. He might need translation, but again, that can be crowd-sourced too.