money

Trade is the best way to get a lot of money. So build freighters, send them to distant planets, and trade your techs to the minor races. Building starbases along the route of your freighters with trade bonus upgrades will help a lot too.

You can take the Evil Do'er route and demand tribute from all races. You will not be real popular and your game interface will turn blood red and you will be serenaded with nice pleasant Demonic Satanic type music. LOL
I acccidently turned evil in one of my games I decided to quit. It was just to errie for me too keep playing as evil person. I bet it is just me who has a problem with being evil. I seem to enjoy wiping out the evil in the galaxy rather then being one myself.

~SDC~