It probably helps when planning what sort of wedding you would like to have to know what sort of wedding you can afford to have. I found this 'wedding cake' at Consumer Reports.org which breaks down the costs of four different types of weddings based on US sourses. Prices don't include wedding rings or honeymoons.
Key: Pink = quickie Las Vegas wedding - Guests 1 = $200
Green = Destination wedding to Hawaii - Guests 30-40 = $12,000
Blue = The average weddings - Guests 175 = $22,000
Yellow = Big, fancy summer wedding in New York - Guests 200 = $153,000 (ouch!)
Related: Debates - money I Celebrity Pre-nups I Splash, splurge or save?

From: Daily Frock: Suzanne Neville Antoinette