A 50th birthday is a big deal, and that private room at your favorite restaurant is the perfect setting. Since these venues book up fast, aim to lock in your date at least two months out so you aren't scrambling for a Plan B.
The cost of a celebratory dinner for a group can easily hit $1800. Breaking that amount into smaller, manageable chunks makes the planning process much less stressful.
This 0% window is a deadline, not free money. If you don't pay off the full $1800 before the 18 months are up, the remaining balance will begin to accrue interest at the standard rate.