Mining

List of Sing Acts:

 * Construct mines; Cost: 100,000 coins and 1000 citizens. Earning: +500 coin/week.
 * Upgrading basic equipment; Cost: 250,000 coin. Earning: +1000 coin/week.
 * Extend supply chain; Cost: 300,000 coins and 2,000 citizens. Earning: +2,000 coin/week.
 * Extending mines; Cost: 650,000 coin and 3,000 citizens. Earning: +3,000 coin/week.
 * Extending surrounding houses; Cost: 500,000 coins and 1,000 citizens. Earning:+2,500 coin/week.
 * Use slave labor; Cost: 2,000 slave. Earning: +1,500 coin/week.