I would not purchase FreeSpace 3.
Pursuing the FreeSpace license is a waste of time unless you can figure out why FS2 tanked... and this was despite the rave reviews from the press. Personally I thought the game had good but not great production values compared to the WC series, which is why I never bought into it. The WC series on the other hand got quite redundant and dare I say boring.
Seriously, wouldn't your time be better spent working on a X2/Freelancer/Elite style game instead?