Look, you’ve been nailing it. Your YNAB categories are locked down tighter than a drum, your Rule Four buffer is purring like a kitten, and you’ve got your holiday spending plan ready to roll. But then—BAM!—your kid walks in the door, eyes wide, and drops the real Halloween surprise: “I need a costume tomorrow... and I want to win best-dressed.” ‍ ‍ Pshh. You’re a YNABer. You’ve been training for this moment. You know how to shuffle your categories, roll with the punches, and pull off some last-minute costume magic without breaking a sweat. Whether you’re raiding the closet or hitting the craft store for some final touches, these DIY costumes will barely make a dent in your holiday category—and if you decide to go all out? No worries! You’ve got Rule Three on your side. Halloween’s got nothing on you. 1. Bat Outta Nowhere An old black umbrella transforms into bat wings with just a few snips—cut it in half and attach it to the arms of a black hoodie.…