When my daughter got married in 2009, they went for a big event, as all their friends did. I felt it was too much as well, and I have to admit to protesting at the start. But I soon realised that I could spoil it for them, and for myself, by grumbling along with it all, and decided to go with whatever they wanted to do. It was their wedding, and it was important that they could celebrate it in the way they wanted. The funding was mainly their responsibility, and they carried it off.
I had some magical times, going to choose the dress, helping with some of the decorations, an emergency dash to find some wedding wellies when snow was threatened, and the event itself was just brilliant. I have the photos to remember it by, and I'm so pleased I stopped grumping!
Even more pleased as my son died about a year later, and we had that magical time together as a memory to cherish.
I hope you find a way of managing it all.