Alright, there's a moment of mild ingratitude coming up and for this I apologise.
My future-MIL and FIL have very, very generously given us £4000 towards the wedding. MUCH more than I ever dreamed they'd be able/willing* to contribute. With the money we already had saved up, we now have a reasonable budget for the wedding. MIL promises that there are "absolutely no conditions to the money, honestly". However, she turned her nose up at my ultra-chilled seaside/camping/field/marquee/hog roast idea and insists that "a Milton Keynes hotel wedding would just be so much easier for all the guests". She'd also like to know if I'd consider asking my future-SIL to be a bridesmaid. Never mind the fact that I already have THREE bridesmaids who are long term, very close friends of mine. Never mind that future-SIL doesn't even like me and has had me blocked on facebook for almost 2 years ever since we fell out over a comment she made about a photo of my daughter! If I had a bridesmaid vacancy, I'd be inclined to ask future-BIL's wife as she and I get on really well and she's been a great help with a lot of wedding plans so far. But h2b's sister and I are just from different planets!
So yeah, the money DOESN'T come with conditions, except it does. We can't afford to turn the money down and we're not SO opposed to their requests that it would be worth hurting their feelings by being so ungrateful. It just looks like we're going to end up with a more mainstream traditional wedding than either me or h2b thought was 'us'.
Sorry, needed to get that off my chest!