A good 4K camera drone is not a toy. It is a serious tool for capturing footage that lasts, which means you want to buy something that will remain relevant for at least three to four years. Buying a cheap knockoff usually means dealing with shaky video and weak battery life, which just forces you to buy twice.
Drone companies typically drop their new models in the spring or late fall. If you time your purchase right, you can snag the previous generation at a steep discount. Often, the older model is nearly identical to the new one, but costs hundreds of dollars less.
Remember, 0% interest is a temporary runway, not free money. If you still have a balance on your Citi Simplicity card when the 18 months end, the standard variable APR will kick in on whatever is left, making your drone much more expensive than you planned.