This guy is no different from a pnahandler.
Some say "panhandler," others say, "extortionist."
I'm all for allowing access to many places and activities for disabled people, access should be granted (and attempted) in a reasonable manner. Neither Disney, nor should any other entity, have to pay exhorbitant costs to accommodate all people under every physical circumstance.
What about rides like Space Mountain, Everest, or their water rides? It would be impossible to accommodate wheelchaired rides on such rides--at least not without the costs of building a special car, just for them.