You will get more money as you progress and dont forget to give the 5,000 to the investor BEFORE you go to the spire. You should have a nice bonus when you get back. Also look out for books to get dog better trained in finding items. You can also buy a 'gold' augmentation that will give gold for every kill.
i think you mean "golden touch" you can buy one at the market or the gypsy camp, MUST BUY!