Two-Story Lobby:
when placing the first lobby section hold Ctrl.

Three-Story Lobby:
When placing the first lobby section simply hold Ctrl + Shift.

Start with $4 Million:
Begin a new game and attempt to place a lobby section all the way to the 
bottom and the left of the edit screen.

Automatic Removal:
To instantly remove an item hold Shift when placing a new unit over it.

Extra Condo Money:
To get extra condo money use the magnifying glass and click on the condo 
that is marked "For Sale". A message similar to "The conditions are terrible" 
will appear.. Click on the current price, and lower it to $4,000. The comments 
will disappear (but do not exit). Immediately after the price has been lowered,
increase it to $20,000.