Owning a used pickup gives you the utility you need without taking the massive new-car depreciation hit. Beyond the $18000 sticker price, you have to budget for fuel, higher insurance rates, and routine maintenance like new tires and brakes. The trick to getting a fair deal is shopping when lots get crowded with trade-ins, which usually happens right after new models roll onto the lot.
Keep the vehicle negotiation completely separate from how you plan to pay. Dealers want to roll everything into a monthly payment that hides the actual price of the truck. Lock down your out-the-door price first, figure out your deposit and extras second, and never let them talk about payments until the vehicle price is set in stone.
Remember that a 0% intro APR for 15 months on purchases and balance transfers is a strict deadline, not free money. If you still carry a balance when those 15 months run out, standard interest will kick in on the remaining amount.