RHINEBECK, New York (AP) – Imagine spending $250,000 on flowers or $20,000 on a cake. How does $15,000 to $20,000 for toilets sound? Sounds like the first “Wedding of the Century.”

Wedding industry experts say that when Chelsea Clinton gets married Saturday at a private estate in upstate New York, the tab could hit $2 million, $3 million or more – a canape or two above the average $24,000 that most American newlyweds will shell out this year.

Most weddings host about 150 guests; the Clinton-Mezvinsky nuptials are expected to have 400 to 500.

Details have been notoriously scarce, but Sally Kilbridge, deputy editor of Brides, said industry insiders have gathered enough intelligence to sketch out roughly what sort of shindig the daughter of President Bill Clinton and Secretary of State Hillary Rodham Clinton will put on when she marries her longtime boyfriend, investment banker Marc Mezvinsky.

Some estimates put the cost at close to $5 million, but Kilbridge said Chelsea Clinton won't let it get too extreme.

“I'm going to say 2 to 3 million dollars,” Kilbridge said. “Just because I don't know if they will go that over the top when it comes to every little item of the wedding, and possibly because it's not really Chelsea Clinton's style.”