You are four weeks away from watching a one-year-old obliterate a cupcake on your living room rug, which means the DIY party prep starts now. Lead-time is your best friend here, giving you time to hunt down bulk decorations, source the smash cake ingredients, and pace out your spending before the house is full of toddlers.
We are looking at about $550 for the whole setup, from the smash cake and decorations to food for the adults. Let's break that down into manageable pieces so you aren't stuck paying for balloons and banner paper all at once.
That 0% intro window is a deadline, not free money, so make sure the $550 balance is paid off before the 18 months are up or you will get hit with interest on the remaining amount.