Ideas are quite simple here, there are some building ideas that generates money.
• Small Commercial Building - These small buildings can be rented for community business use. Rent goes to your treasury.
• Medium Commercial Building - A direct upgrade of its smaller version, supporting more businesses and extract rent money form them.
• Commercial Centre - A centre commerce. It is able to serve tourists, while rent goes into your pocket like running water.
• Commerce Tower - A superb upgrade of Medium Commercial Building, which will generate mountains of plain money that will fill up hundreds of vaults! (A weaker varient of Investment Bank)
• Rent Collection Agency - Consuming civics, and they will collect housing rent in a colony-wide scale.
Morr ideas coming soon!