You have three main choices for how you can approach taking this heist on: Aggressive, Silent and Sneaky, or the Big Con. Each have their own setup missions, but all have six that are mandatory and seven optional.
The Diamond Casino Heist - Cash ($2,115,000 -R$2,326,500)\n\n It will cost $25,000 to set up the heist and there are three different approaches to completing it. The silent & sneaky approach is the least disruptive but requires players to be incredibly stealthy.