A professional camera body is a tool that should last you at least five to seven years. It is better to buy a high-end body once than to buy a mid-range model that you will want to replace in two seasons. We look for weather-sealing and dual card slots so your gear survives the elements and your photos have an immediate backup.
Timing is everything with tech. Last year's flagship model is often the better buy because the sensor and autofocus are still elite, but the price drops significantly when the newest version is announced. Holiday rebates usually stack on top of these existing price cuts, making the $1600 price point a realistic target.
The catch is that this 18-month window is a hard deadline. It is not free money; it is a period where interest is paused to give you breathing room. If you still have a balance when that period ends, the standard variable APR will apply to whatever is left, which will make your camera much more expensive in the long run.