Yea basically just keep building profitable corporations eventually start an enterprise when you are making money.like 200B a month wait to have several Trillion. Start the enterprise dump money into and build build build corps. Start with mining. That should be your first 100 corps as an enterprise. Then start a common market. Don't invite others at this point but off everything you make to the common market it will ensure your corporatio s are buying supplies from you yourself anything left over will get sold publicly. Also if your short on money look into corporations that sell goods on direct trade page. These make a lot of money. Eg. Power internet software.