Imagine spending $250,000 on flowers. Or $20,000 on a cake. How does $15,000 to $20,000 for toilets sound? 
 
 Elisabeth Gruender, right, a producer with ARD German TV, is interviewed by Today show host Natalie Morales, second from right, in front of the Beekman Arms Inn, Wednesday, July 28, 2010, in Rhinebeck,... (Associated Press) 
 
 Astor Courts is seen in Rhinebeck, N.Y., on Wednesday, July 28, 2010. (AP Photo/Mike Groll) (Associated Press) 
 
 Astor Courts is seen in Rhinebeck, N.Y., on Wednesday, July 28, 2010. (AP Photo/Mike Groll) (Associated Press) 
 
 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 former 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," 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." 
 
 Kilbridge estimated costs for some of the higher-profile items: 
 
 _ Gown by Vera Wang, whose New York store Chelsea was photographed visiting: $20,000 _ not off the rack, obviously. 
 
 _ Cake, possibly by Sylvia Weinstock: $20,000. Expect intricate, fabulous designs. 
 
 _ Flowers: $250,000. "It's going to be glamorous with a capital G," she said. (And this isn't even that much, she said: Donald Trump laid out $500,000 for flowers when he married Melania.) 
 
 _ Catering: $750,000. Add another $30,000 for beverages. 
 
 _ Tents: $600,000. These, she joked, guarantee it will not rain. 
 
 _ Portable toilets: $15,000-$20,000. These will not be construction-site facilities. Think air conditioning, attendants, flowers. 
 
 _ Entertainment: $40,000. 
 
 "It's obviously a large wedding," said Darcy Miller, editorial director of Martha Stewart Weddings. "But knowing what we do about Chelsea, she seems to be understated, someone who has tried to stay out of the crowds, someone who has tried to have her own life." 
 
 Miller also brought up the logistics and realities to confront. 
 
 It's a destination wedding where everything from guests to flowers to the wine will be shipped in from afar. So, they've got to keep the flowers cool, the guests and staff fed, quartered and cool. The stylist needs a room for the night. So does the makeup artist and photographer. Bring enough to tip the wait staff needed to keep 500 A-listers well-served. Valets? Flooring? Lights? 
 
 Cha-ching. 
 
 For those worried about how the Clintons will finance the celebration, fear not: Chelsea's parents are, conservatively, worth tens of millions of dollars. The former president raked in $40 million in six years just from speaking engagements _ upwards of $10 million alone in 2006. Of course, this assumes they'll pay for the party. Like every other detail, mum's been the word. 
 
 And then there's security. Some of it will be paid for by the couple. But when there's a diplomat for a mother and a former president for a father, the government picks up some of the tab, too. And agencies like the Federal Aviation Administration help out by declaring a no-fly zone in the air space over the site along the banks of the Hudson River. 
 
 Aerial photographs by The Associated Press show that large party tents have been erected at the palatial Astor Courts, a historic estate most widely reported to be the location. Locals told the AP that a caravan of black limousines snaked down a road to the south that's sprinkled with similar properties. And a state police official said some roads would be closed and parking restricted Saturday around the center of the village. 
 
 Then there's the air space closure from 3 p.m. Saturday to 3:30 a.m. Sunday in a generic FAA nod to "VIP (Very Important Person) Movement." 
 
 The status is granted only to the highest of government officials _ which would include Chelsea Clinton's parents. 
 
 "It's good policy. You do have a former president showing up at a big event; it's only prudent that the FAA does this," said Michael Boyd, airline consultant and president of the Boyd Group International in Evergreen, Colo. 
 
 There were no indications Thursday that access near the estate to the Hudson River, normally plied by recreational and commercial craft, was being similarly restricted. The Dutchess County sheriff's marine patrol planned no special changes Saturday and hadn't received any restriction notices from the Coast Guard, patrol Sgt. Michael Dampf said. 
 
 Amtrak, which runs passenger trains along the river, expected no changes in service Saturday, said spokesman Cliff Cole. 
 
 Despite all indications pointing to the Clinton wedding, State Police Maj. Michael A. Kopy refused to spill the beans. 
 
 "There's a private event that's planned for the Rhinebeck area," he told reporters. "We expect a significant influx of people and vehicles in the Rhinebeck area, which is typical during any summer weekend." 
 
 Police were predicting an influx of reporters and curiosity seekers, but Kopy said he was confident that traffic plans used for other large events, like the Dutchess County Fair, would be more than adequate. 
 
 The media and the public aren't the only people watching, though. 
 
 Kilbridge and Miller both said the high-profile nuptials could send a ripple through the wedding industry, inspiring other brides to reach a little higher. But unlike some of the gaudy celebrity weddings of the past, for which the hype leading up to it lasted longer than the marriage itself, there is something more concrete about this wedding, they said. 
 
 "When you look at someone like Chelsea _ who seems like a very serious, sober-minded woman and very committed to her fiance _ then you look at it, and say, `This is a really high profile family, they've waited for a while for her daughter to fall in love, they're doing it right,'" Kilbridge said. 
 
 ___ 
 
 Associated Press writers Michael Hill and Rik Stevens in Albany contributed to this report. ||||| Security tight on the eve of Chelsea Clinton's Rhinebeck wedding to Marc Mezvinsky 
 
 Santos for News Goin' to the chapel and we're gonna get married - under watchful eye of about a bazillion security guards - two of whom ride with bride Chelsea Clinton. 
 
 Here comes the bride - and the heavy-duty security. 
 
 Chelsea Clinton and her fiancé are due Friday night in upstate Rhinebeck to host a rehearsal dinner prepared by one of Oprah Winfrey's favorite chefs. 
 
 Coming with the former First Daughter are the Secret Service, the state police, road closings and a no-fly zone over the tiny upstate town hosting the splashiest wedding of the summer. 
 
 Tight security was in place Thursday at the sprawling Grasmere Estate, where Clinton and husband-to-be Marc Mezvinsky were expected to host guests on the eve of their nuptials. 
 
 An assortment of vans and trucks were parked as workers loaded tables into the second floor of the renovated stone barn where the couple will sit for the traditional pre-wedding meal. 
 
 Although details remained scarce, expect the bride's parents - in this case, former President Bill Clinton and Secretary of State Clinton - to attend. 
 
 Chef Laura Pensiero, whose GiGi Trattoria opened nine years ago in Rhinebeck, is one of the caterers for the high-profile affair. 
 
 Her restaurant uses fresh ingredients from local farms, and specializes in homemade pastas, healthy Mediterranean fare and vegetarian dishes. 
 
 The food is mouth-watering, but the chef was close-mouthed. 
 
 "I can't talk about it," Pensiero told the Daily News yesterday. "How did you find out?" 
 
 Pensiero is a favorite of Winfrey, and was named by "O" magazine as one of the nation's top five "Gifted and Giving" food professionals. 
 
 Winfrey is among the 500 guests expected at tomorrow's wedding on a 50-acre estate with breathtaking views of the Hudson River. 
 
 State police confirmed yesterday they will patrol the Hudson to ensure the newlyweds have privacy from water-borne paparazzi. 
 
 The Secret Service was also making the rounds of town as the big day approached, and local cops were more visible. 
 
 The Federal Aviation Administration has declared local airspace off limits for 12 hours starting at 3 p.m. tomorrow. One main local road will close from 4 p.m. tomorrow until early Sunday. 
 
 "Rhinebeck is a small village," said state police Sgt. Jim Kranik. "A busy village. We plan on keeping traffic moving." 
 
 lmcshane@nydailynews.com
– Wedding Watch 2010 is at a fever pitch on the eve of Chelsea Clinton’s nuptials. Security is tight as Clinton and Marc Mezvinsky prepare for tonight’s rehearsal dinner at the Grasmere Estate, a renovated barn, the New York Daily News reports. The Secret Service is in town, and state police are planning to patrol the Hudson River to control paparazzi. The FAA already declared local airspace a no-fly zone. No details on who will attend tonight’s dinner, but a chef from a local restaurant is one of the caterers. Laura Pensiero is a favorite of rumored wedding guest Oprah Winfrey’s and is known for making Mediterranean fare with local ingredients. All this attention is good for the owners of Astor Courts, where Clinton will wed: The property has been on the market for $12 million since October, and they’re hoping to catch a buyer’s eye, the New York Post reports. For more on the wedding and the reported $20,000 cake(?!), click here.