Backyard party vendors get booked solid fast once warm weather hits. If your kid has a summer birthday, waiting until May to reserve a bounce house and catering usually means paying extra or settling for leftover options. Locking in your package in early spring gives you the best selection and sets your budget before party season kicks into high gear.
A solid backyard setup with a bounce house, basic catering, and supplies runs about $800. Instead of taking that entire hit at once right before the party, you can space out the payments so it barely touches your monthly cash flow.
An intro window is a repayment deadline, not free money. If you do not pay off the full balance by the time the 18 months are up, regular interest charges will kick in on whatever balance is left.