I'm not one of the best freelancers in the world, but I suspect that if I were, I would say there's no amount of money you could pay me, because I'm already making all the money I want working on projects I am interested in. The fact that, in our reality, Hertz went with Accenture, probably indicates they have other dysfunctions as well, and would be a pain to work with.
I really think the skills and "product" would be better. The managing and structure could be a nightmare though.
Then again, Accenture shows they can be a nightmare too.
Probably much less. The issue is finding those folks (or getting hold of their time).