Render engines eat weak hardware for breakfast. You want a graphics card that handles heavy 3D scenes or 4K video exports without choking, and you need it to last at least three or four years so you are buying once instead of twice.
Timing matters here. Tech brands love annual release cycles, but last year's top model often drops in price right when the new line lands. That gives you almost identical render power for a lot less cash.
Keep in mind that a 0% intro APR window is a rigid deadline, not free money. If you still have a balance when those 15 months end, regular interest rates kick in on whatever is left, making your GPU much more expensive.