A four-bike hitch rack turns your car into a mobile trailhead, but lugging four heavy bikes means you need a heavy-duty platform rack rather than a flimsy hanging style. Owning one is great until you realize how much parking garages hate the extra length on your bumper. Gas mileage takes a tiny hit, and you will definitely back into something if you forget it is back there. The secret is buying when dealers clear out summer gear to make room for snowboards, usually right as August ends and September rolls in.
Getting a good price on the rack itself is a separate job from figuring out how to pay for it. Do not mix up dealer discounts with payment plans, because the store just wants the box off their floor. Once you lock in the clearance price, we can look at spreading out the cash flow so your checking account does not take a sudden hit all at once.
That intro window is a strict deadline, not free money, and any remaining balance left over when it ends will trigger standard interest charges on the whole original amount. Pay the math-backed monthly amount every single time so the rack is completely yours before the deadline hits.