Our parents paid for the most expensive bits (my parents, venue and catering, which is the vast majority of the cost, his parents for flowers, transport, DH's suit, which cost more than my outfit, and entertainment) - I know this is weird these days but it's still quite common in Jewish families.
I paid for my outfit (bridesmaid dress, handmade shoes and custom hat - came to about half the cost of average wedding dress) and my first night in the hotel - my mum paid for the wedding night. I would guess it came to about £25k for it, we had around 180 guests.
I think everyone was very happy with it, we were. The cost was in the catering really and we wanted to have friends and family friends there - the most extravagant single thing was the wedding night hotel, which was a real boutique luxury job that we'd never stay in otherwise.
I'm always for people doing whatever makes them happy and that they can afford, be it a couple of hundred quid (one of the most memorable weddings I went to was also the cheapest!), or £100k. If we'd been paying ourselves, I expect we'd have had a marquee in my parents' garden, 100 people, a buffet and photography and DJing by our mates which I guess we could have done for under 10k.