There's no way the TOC could be run from admission charge alone, but it it were high enough it would certainly help. If you went to a big concert of some sort - like Creed or Faith Hill or whoever - you'd probably spend at least $50 for the tickets, so why not have $50 tickets for the TOC? OK I know this would deter some people, but I think most everyone that goes spends at least several hundred dollars to go (airfare, hotel, food, plus money lost from taking off from work, etc), so what would a measly extra $50 be? Heck, put away just a dollar a week and by the time the next one comes around you'll have your admission money! Anyway that's just MHO.
I do hope someone picks up the event - I never got to go