Ape Apps

Once you build up your colony quite a bit, you will need to start boogeying on the money train. As long as you have people in your colony and jobs in your buildings, you will need money. Also, money is just cool because you feel powerful :3.
A smart move is to start making money early on with a Gold Refinery and Gold Mint and eventually work up to expensive buildings like the Investment Bank. But alas. Even though the Investment Bank is very expensive, it is worth the buy and if you can fill the jobs quickly, it will provide enough money to buy/import what you payed to build it. I receive $2,300 per minute average. If you really want to see $$$ try Exporting Microchips and Robots. I receive an average of $40,000 per exporting 1,000 of either.
Another smart move, and what I personally endorse is the exportation of Uranium.
Get your hands on Uranium somehow. All you need is 1000. From then on, use the Uranium Enrichment Facility to double each individual Uranium unit. Between these three materials, and if you create houses, immigration, and rations/water resources correctly, you can base an Empire off of exporting and importing, just like any real-world nation/country.