Step 1: need 3 players. 1 starts an invite only session and goes into there garage.
Step 2: invite 2 more people to the game.
Step 3: a armored truck will spawn.
Step 4: throw sticky bombs on the back doors. and blow it up.
Step 5: once that one drives away and u collected the money, another will spawn within 20 seconds close to you and your friend.
Step 6: take turns going back and forth to rank up fast and earn money at the same time!