Boys are weird. Its true. But maybe he thought he came up with a great compromise, and maybe his feelings are hurt too since you shot him down?
I paid for our trip since I make more money and won a few scholarships at the end of my last school year. We're going percentages on the wedding, extras, spending money, etc to make it fair - 35% of each of our take home pays goes into a joint account. Once we tie the knot in 24 days (!!) that will be our primary bank account with shared funds.
We've had to cut stuff, change things because of money... but the most important thing to remember is that when it is all over the one thing that will matter is that you will be married!
Don't be sad.
Try and remember that the boys see things differently, don't think about things the way we do, and usually only see things in black or white. Us girls are way too full of grey nuances I think!!

I cried when he didn't clean the toilet after he was home all day and I was at work all day. It didn't occur to me until the next day that I was upset because I was work stressed and over tired - and he had just slept off a night shift and had about an hour to chill out before he made supper before another night shift. I was all focused on the one tiny thing that I had hoped he would do while I was at the grind.

You want the wedding, so find a way for the finances to work. If you have a plan outline and then share that and show him you can both afford to do it your way, he might be more accepting to the amount of money difference you're talking about!