You picked the ring. Now you need photos for the save-the-dates. Good photographers book fast, but you don't need to pay the whole bill upfront if you set up your timeline right.
A solid engagement shoot runs about $450. If you book off-peak and spread out the cost, you can handle it in small monthly chunks without adding interest to your total.
Remember, a 0% APR window is a deadline, not free money. If you still owe cash after 15 months, standard interest rates kick in on whatever is left. Set your autopay so the balance hits zero well before time runs out.