That actually doesn't sound ridiculous at all. Sounds amazing, and totally unique too.
In terms of expense on a wedding, it's all relative isn't it? We spent a big lump on our wedding, and I don't regret it at all. We were in a position to do so, and so we did. It was only 50 people, and we had it in Santorini. We didn't think we'd ever get those 50 people together in the same place again, and we wanted to have a huge celebration. We even brought a film crew over from London to make a music video of the footage.
It was amazing, and the video still gives me goosebumps now. If I hadn't spent it on a wedding I'd have spent it on shit like cars and clothes anyway... And I've never got goosebumps from looking at a pair of jeans.