Might not be all that helpful for some on here to tell you how much they would charge, what might take one person a half an hour to do, could take another a day to do. And it depends on folks rates too. So I personally cannot be much help with that.
But maybe this would help. If this were my job, I would print it out. Pull out a transparency, grab a sharpie and trace this bad boy, simplifying (like others suggested) as I go. Then scan it as a black and white image. Then take it into your auto tracing software of choice to get it into vector format. If you are using Adobe or Corel you can use the smoothing tools that both seem to have to clean up the vector shapes. Then come back in and add your color fill.