Rehearsal dinners at local spots fill up fast, especially on weekend nights. You need to lock in that back room or long table at least three months before the big day. It's the first real moment everyone relaxes, so getting the venue right matters more than fancy linens.
A typical dinner for a medium-sized group runs about $1,800. If you start planning early, you don't have to drop that entire amount at once. You can use a specific window to pay it off in smaller, more manageable chunks.
This 0% period is a helpful tool, but it isn't free money. If you still have a balance after those 18 months are up, the standard interest rate kicks in and makes your dinner more expensive.