If he really did it all for his family, he would have taken the job and money from Elliot Schwartz.
He did it because he liked it.
Walter is evil, you're just too emotionally invested in the character to see it.
1. Full 3D Open Space - Including PvE, PvP and Exploration
2. Guild Capital Ships
3. Mini games - e.g. Pod Racing (on Tatooine, more maps the merrier), Pazaak on Nar Shaddaa, etc.