Road trips are great until your car is packed so tight nobody can move their legs. Adding a roof rack and cargo box fixes that cramped feeling and lets you bring the real gear. But buying setup gear all at once can put a real dent in your checking account.
Timing matters here since outdoor retailers usually discount these setups in August. Once you catch a price drop, you still need a way to pay for it without draining your emergency cash. That is where spreading out the cost comes in handy.
Remember that the intro window is a deadline and not free money. If you still have a balance left when those 18 months are up, standard interest kicks in on the remaining amount.