Here's my humble opinion (Is there such a thing about someone else's wedding?)
There are companies who produce replica dolls based on submitted photos. I'm sure they aren't cheap, but probably less expensive than that wedding cake. I think the bride should have sent photos of her in her wedding gown to one of these doll companies, and had her dream come true... a doll in her likeness and in her wedding gown, no less. It would be a treasure and a keepsake, not just a bunch of photos of an extremely customized cake. And if at some point the marriage didn't work out, she could put doll clothes on it. If it's your dream and you're going to spend that much on it... choose wisely.