A solid dual-boiler machine and a capable grinder give you café-quality shots every morning without needing an upgrade for the next decade. Buying the right gear once beats buying cheap equipment twice and replacing it in a year.
Keep an eye on the release cycles, because last year's model often drops in price right when the newest version hits the shelves with minor cosmetic tweaks. Holiday bundles from specialty coffee retailers are your best bet to grab the machine and grinder together with a few bags of beans thrown in.
That 0% window is a hard deadline, not free money, and whatever balance is left when it ends will start racking up interest fast.