A trailer hitch turns your vehicle into a workhorse, but the cost of hardware and professional labor adds up fast. Expect to pay around $650 for a quality setup installed by a shop.
Timing matters here. Shops are usually slow during the winter months, so that is when you should ask for a discount on labor. They are often happy to negotiate to keep their bays busy while the rest of the world is staying inside.
That 0% window is a deadline, not a gift. If you still have a balance after 15 months, the lender will charge you interest on whatever is left, which defeats the purpose of spreading out the payments.