We are getting married at a Registry Office at 3.30 p.m. We aren't doing the sit down four course meal jobbie, just having everyone back to a local venue for canapes and fizz which we are paying for and putting some money behind the bar then having a buffet at 7 for everyone including the evening guests. The bar will be a pay bar for the evening. DJ comes with the venue and we can go in the morning and decorate it all we like or we can pay them £150 and they will do it. I am insisting on having my hair/makeup done by someone at home. Got my dress from a wedding dress shop - end of line and in the sale plus a little bit of bartering and I've got the fittings thrown in for free (usually £60-£70!).
What with buying invitations, groom suit, cake (mum is buying for us), flowers (only having my bouquet), shoes are being my something borrowed from a friend who is married, we are not having wedding cars or bridesmaids (can't honestly see the point but that's just me) - it all comes to around £3500 and I thought that was more than enough.
It may be worth asking around some local pubs or clubs if they offer rooms, some places let their function room for free as long as you use their bar for the party as they know it will be worth their while.
Always ask around, ask everyone - everyone who is married will enjoy chatting to you about their big day, what they did to make it special and how you can cut corners. You'll be amazed how skilled some of your friends are. I got an amazing deal on a photographer as I happened to mention I was struggling to afford it and they offered their partner who is a wedding photographer -for half the price!
Try not to get swept into the 'you must do this/that/the other' it is your day so do it how you want to. Only invite people that you want there. I've already had the 'oh but why cant great aunty doris who we haven't seen for 25 years not come, she'll be so disappointed' conversation with my mother. Great Aunty Doris is probably dead so I really cant be arsed to invte her (and believe me this conversation has happened in my family - my mum and nan fell out for three years over it when my uncle got married - and 'aunty doris' was actually dead!!!)
Good luck and have fun planning/enjoying it!