Saved $150,000 between your wallet and the bank.
This requires you to have a total of $150,000 saved between your wallet and bank. Remember to bank the money in your wallet often to minimize losses if killed. Maximize the earn of rackets by completing the trafficking missions, collect kickback from your underbosses once per game-day and pick up cash from enemy locations as you progress through the missions.
Refrain from spending large amounts of money on weapons and supplies until the achievement is unlocked. See the Tac-Vest page and the individual weapons pages for locations where free equipment can be acquired.