A backyard brunch is all about the mood. You want to focus on the conversation, not the bill. Getting your local cafe orders in by mid-week gives you the best chance at getting your first choices and avoids last-minute rush fees.
You are looking at about $1000 for a solid spread. Planning this now helps you break that number into smaller, manageable pieces so the cost doesn't sting all at once.
The 15-month window is a deadline, not a pass to pay later. If you still have a balance after those 15 months, the card will start charging interest on whatever is left, which gets expensive fast.