I am not sure if you have picked out a venue yet, but pick something that is already themed, for instance Living Seas. Im having a brunch at the LS and need no decor other than centerpieces, and since the ceiling is low, I can get away with just simple, small centerpieces. Thus, less money on floral. Also most ceremony locations need no dressing up, so cut back there as much as possible. I am, too,trying to save money anywhere I can, Good Luck