Happened to us. I just have an assload of aunts and uncles, who in turn produced an assload of cousins, on both sides of my family. And they’re all married, and all have kids, and all live far away. Sure, we could have said “no kids”, but then many of them wouldn’t have been able to come, and we did want them to be able to make it. So that gang, plus his family, plus a handful of friends and guests on either side, added up to just over 200.
And since 95% of these people were making long trips to be there - most were “only” halfway across the country, though a few were coming in from other countries - we didn’t feel right just having a cake-and-punch (or beer-and-snacks) reception. So we had a really nice dinner, and good drinks. The venue didn’t cater, so we found our own caterer, and we bought our own alcohol and saved a ton.
And we tried not to inconvenience any of the guests any more than necessary, because so many of them were coming so far and spending so much just to be there. So we paid for the wedding party’s dresses and ties, and we hired a bus to take folks from the hotel to the wedding and back again so they wouldn’t have to rent cars (and wouldn’t wind up driving drunk). We basically didn’t want people to have to do anything other than show up.
But we’re actually pretty frugal, so everything else, we saved as much as we could. I made my dress and all the decorations, we printed the invitations, my husband coordinated all the music on his iPod, we went with the cheapest photographer we could find, we got our cake at the grocery store, we had it way, way off-season, etc. All told, it still came in at around $30,000, I think. This was a few years ago, in the DC area. But that was for literally everything, from engagement ring to honeymoon, every last ribbon, favor, and song download.
And we covered it all ourselves, with no debt! Woo-hoo!