Purchase the following Montana Investments at "Exotics" > "Investments" to gain the corresponding upgrades:
INVESTMENT - UPGRADE Montana Records - Unlocks new music tracks and create a new playlist. Montana Holdings - Fronts cost 10% less. Montana Fitness - Henchmen gain 50% health. Montana Productions - Unlocks Tony's clothing options at the cheat menu. Montana Legal - Visibility Events reduced by 50%. Montana Sports - Maximum bets increase. Montana Financial - Launder your cash with 0% interest. Montana Defense - Carry an extra weapon with max ammo.