A bachelorette beach weekend is the kind of trip that sneaks up on you: small deposits, then bigger ones, then a final lump that hurts more than it should. The good news is the timing is on your side. Book rentals and flights early, skip the weekend airfare surge, and you've already cut the bill before you've paid a cent.
Most of what you'll spend is the rental and the flight, and those two pieces are also the easiest to plan around. Once you've locked those in, the rest of the weekend tends to fall into place.
The 0% window is a deadline, not a discount. If there's still a balance on the card at month 19, that remaining amount starts collecting regular interest. Set a calendar reminder for one month before the 18 months ends so you can pay it off, transfer the balance elsewhere, or know exactly what's coming.