Should I let my indebted brother spend a fortune on his wedding?

Every week a Guardian Money reader submits a question, and it's up to you to help him or her out – a selection of the best answers will appear in Saturday's paper. This week's question My brother is close to bankruptcy yet he's planning a wedding that's going to set him back £12,000. He thinks it's the right thing to do, but I'd be quite happy just going down the pub. What ideas do readers have for a cheap wedding that will still be special and memorable? Or should I not interfere and leave him to sink further into debt? What are your thoughts?