In my honest opinion, the minute we privatize the ISS our space station will go to shit, it's already heavily underfunded to begin with. SpaceX is a prime example of a privatized company writing their way into the history books but not every company will be as successful. The pro's will be a ton of funding coming from all of these companies but what are the cons? What are these companies asking for in return?
I'd love to be the fly on the wall...
-xfial