A petting zoo is the main event, so lock in your date early to snag that Sunday discount. Sunday bookings are often cheaper than Saturdays because demand is lower, helping you keep your total cost closer to the $650 average.
You need to handle the booking months in advance to ensure the animals are available. Use this lead time to build your cash flow so the expense doesn't hit your monthly budget all at once.
That 0% intro APR window is a deadline, not a gift. If you still have a balance after the 15 months are up, you will start paying interest on whatever remains, which makes the zoo much more expensive than you planned.