From Zero To Hero: Cityman Hack -

: For a high-risk "hack" to get rich quick, use the casino. While it can win you "big bucks," it can also drain your starting capital, so only use it when you have a safety net.

: You cannot reach the rank of President if your character dies young. Use resorts and hospitals to keep health high, and attend concerts or bowling to boost happiness. From Zero to Hero: Cityman Hack

: Whenever you face a financial deficit or progress stall, watch the available in-game ads. This is the most consistent way to gain immediate cash or boost stats without spending resources. : For a high-risk "hack" to get rich quick, use the casino