I got married 13 years ago in a beautiful dress, in a big church and with 180 day guests and 350 in total at night. I was 30, DH was 36. I have a big family and by that late age, we had both accumulated quite a few friends. We were living abroad and wanted all our friends and family to join us.
We paid for it ALL ourselves, it cost 10K. It was fab, we have great photos and memories. And we are still happy. With two great boys.
I never look back and think it was a waste of money. Although I didn't consider myself as a 'princess', it was a smoking dress and I looked great and enjoyed all the preening. What's wrong with that?
Why does anyone pay more (for anything) than other people? Generally it's because they can. If their parents are paying for it, they are lucky. If they are getting into debt, they are stupid.
We could maybe use the money now to fix the gutter on the porch etc etc, but really, do we always have to be sensible?
I do remember everyone telling me that 'something' would go wrong on the day and that I would be stressing it would be a disaster etc. But I figured that I had planned as much as I could, and on the day, as long as DH and the priest turned up, and we were married, then so what. and in fact, nothing did
So I don't know if YABU as I'm sure your decison is right for you, but wasn't for me, and I have never regretted our lovely wedding.