Hi!
(Yes, that was sarcasm. A distributed Wikipedia could be done, and it could be done for less than 1.5 million. That's my belief and I'm sticking with it. Just because something hasn't been done before doesn't make it impossible.)
I believe achieving world peace for 1.5 million is quite feasible too. All you have to do is to redefine meanings for 'world' and 'peace' somewhere.
Same with 'distributed Wikipedia'. It is very easy to distribute it. It won't necessarily work as people are used to.