Looking at his website i don't think he does a huge number of speaking events, so I'd say it'd be difficult to get him to come to a college group in any case. He's getting pretty old at this stage so traveling mightn't be the easiest for him. I think it'd be less a problem of money and more a case of guaranteeing enough people would come to make it worth his while, which we really can't do at the moment.
If we were to get him at some stage i think it'd probably be in the context of publicizing a new book. I'm not sure how helpful we could be with that, given that most of the attendees we could offer would probably be those who'd be interested in buying it to begin with
