1598349 said:
On a practical level, echoing what others have already said, get friends to do stuff rather than buy stuff you don't need. If you are lucky they can cover lots of expense such as wedding car, photographer, entertainment, dressmaking, cake baking, catering. You could even know someone who has a suitable venue.
This is exactly what my neice did recently - although it relies on knowing people who can provide those services in the first place of course! These things were all offered as wedding gifts:
Her friend from university is setting up her own baking and confectionary business, so guess where the cake came from!
Another friend's husband is a former professional photographer, and her sister-in-law is a frustrated atrist, so invitations, place settings, thank you cards etc. were all designed and produced by her.
The reception venue (lovely old village pub) was very inexpensive particularly as they chose a "take it or leave it" menu; Steak & Kidney pie for the carnivores and goat's cheese & red onion tart for the veggies.
My niece is an absolute tidder, and managed to pick up an ex-display dress for 300 quid, including alterations to make it small enough for her.
And finally - invite only who you really want to be there - what's the point of inviting cousin Dave, who you haven't seen or spoken to for the last five years?
Good luck, good fun and have a great future together.