As you progress through the main story, you'll gain the ability to purchase various businesses and properties across Vice City. These properties generate income and often unlock new mission strands. Examples include the Print Works, Kaufman Cabs, and the Malibu Club. Investing in properties is crucial for building your empire and earning a steady stream of cash.
Each property has its own set of missions that you must complete to make it profitable. Once these missions are done, the property will generate daily income, which you can collect from a safe within the property. Prioritize purchasing properties that unlock new mission chains, as these often lead to significant story progression and further financial gains. The Print Works, for example, is essential for the final main story missions.