Loading boats onto the roof changes how your car handles. You feel the crosswinds on the highway, and you notice the extra pull when you step on the gas. It is a setup you want to buy once and trust for years, but getting the towers, bars, and J-cradles adds up fast when you buy everything new at once.
End-of-summer sales are the sweet spot for this gear. Retailers clear out inventory as the paddling season winds down, making it the best time to find markdowns. Keep negotiation separate from how you pay, since local shops and online gear outfitter prices are usually set, but timing your purchase right does the heavy lifting on price.
That intro window is a hard deadline, not free money. If you still have a balance left when the 18 months are up, deferred interest or standard rates will kick in on what remains.