Evil Genius FAQ

Stronghold:
  This stores your gold when it's not in use.  When you build a room or buy 
  something, your minions will run to this room, grab a briefcase, then run 
  to the helipad or docks to get the object, then run to where you want the 
  object and place it.  Don't place this at the entrance of your base (it'll 
  get robbed by agents), but don't place it too deep either, or it'll take 
  forever to get any work done.

  Gold piles up in available space in the room; each stack of gold represents
  $400,000.  The game won't let you demolish a stronghold unless there's 
  another one somewhere with a briefcase rack.
 
  Briefcase rack
    The briefcase rack is the means by which minions store gold in your 
    stronghold when it comes in, and the way they take it out when they want
    to buy anything.  Without a briefcase rack in a stronghold, it won't be
    used to store any gold at all.  If you issue a large amount of build
    orders, minions will have to get the cash from the racks in $5000 
    increments.  If you have more than 1 rack in a room, you can ease the
    conjestion caused by workers lining up.

    Incoming gold from workers stealing on the world map all comes in one
    briefcase per cycle.  If all usable strongholds are full, it'll pile up in 
    the depot.  So if it had been coming in at $30,000/minute and it got held
    up for 5 minutes, you'll have 5 briefcases waiting in the depot that wont
    count as money earned until it gets carried to your stronghold.  
    Ordinarily, one worker goes and fetches it every minute.

    A stronghold with no briefcase rack is a good place to stash stuff out-
    of-the-way, like totem pole pieces, since your minions won't have any
    reason to go in.

  Gold enhancer
    Increases the amount of cash you get from stealing by 10%.