You want a full-frame setup that handles long streaming sessions and crisp vlogs without breaking a sweat, meaning you buy once and keep it for years. Buying a camera is less about grabbing the absolute newest box on the shelf and more about catching the sweet spot when last year's model drops in price because the successor just landed.
Spring is the best time to look for factory-refurbished units directly from makers, since they often come with a proper warranty and a much lower price tag. We can use a structured payment plan to spread out that upfront cost without getting wrecked by interest.
Keep in mind that the intro window is a strict deadline, not free money, and any remaining balance when those 15 months end will start accruing standard interest charges fast.