Sorry this will be long - bear with me.
BIL is getting married in A few months, safe to say we don't get on particularly well with him or his soon-to-be-bride (think huge family arguments about how we are always inviting them over, feeding them etc with no invites in return to even see them). I was surprised to hear that I had been asked to be a bridesmaid, but even more surprised to find out it had been decided that I had to plan her hen do.
I followed her guidelines to the letter : City break/ at least two nights in a hotel/spa day/ go ape and night out. (She estimated this would cost £100!!)
I presented my plans to the other hens who dragged their feet for months before deciding they couldn't afford it, so I changed the location so its closer to home and £100 cheaper. (£104 total which is a miracle considering the list)
Now they are all dragging their feet AGAIN and no money has appeared despite my nagging/texting/calling. When I told my BIL what is happening, he went mental and said that I should have forced them to pay by now and the bride has had a massive strop too that I haven't sorted it out. Bearing in mind the stag do is a festival, which is 5 night ordeal for DH away from me and my newborn and DS3 costing over £300.
So please tell me, AIBU to think that the Bride and Groom are placing too much importance on what they want to do, not on how much their friends can afford? There is no compromise from then at all! Should I have somehow forced the hens into paying? I can only see this ending in the couple falling out with me 
Any advice appreciated as I have 2 months until the weekend is upon us.