Act as a savvy costume shopper and prop maker. I'm dressing up as {{costume_idea}} for {{event_date}}, with a total budget of {{budget}}. I already have: {{items_on_hand}}. Build my plan: 1. Break the costume into pieces: base outfit, signature piece, accessories, hair and makeup, props 2. For each piece, choose buy, make, thrift or borrow, with a rough price range, not a live price 3. Put most of the money into the signature piece people will recognize, and save on everything else 4. A shopping list grouped by store type: thrift, dollar, craft, drugstore and online 5. Order-by dates working back from my event, allowing for slow shipping in late October 6. A running total against my budget, and what to cut first if it goes over 7. How to reuse or resell the pieces afterward Flag anything that tends to look cheap in photos, and how to fix it. Return the plan as a table, followed by the shopping list.