I can't see this happening as an in-house project due to the scope of the project. However, I can certainly see it as a viable kickstarter with a budget of $5,000 to $10,000 on the low side?
I would recommend someone like Robert (http://www.fantasy-map.net/index.php)
He did this map for me for "Priest King of Shade". http://www.ironcrown.com/ICEforums/index.php?action=dlattach;topic=17853.0;attach=3878
That level of tactical map done for the entire hemisphere with some added detail for major roads and cities would be an incredible resource for SW. If the Kickstarter proved successful new features could be added. I got a map of Eidolon printed on canvas from Terry that's fantastic that could be great bonus feature for people who pledge larger amounts.