the event is meant to be challenging, not a roblox tycoon. The purpose of the Federal reserve is to be an end game event where groups of rebels fight the APD for that delicious mullah. Not about grabbing some gold bars and hoping the cops are too busy to arrive immediately.
The event should have a evidence lockup style disable systems before domes could be broken into. something around 4-5 minutes should allow for the federal reserve to become what it is supposed to be.