A pro-level tablet is your main tool for digital sculpting. You want one that handles high-polygon counts without lagging, so focus on the specs that matter for your software rather than the trendiest model. A good device should last you four or five years if you treat it well.
Wait until the summer manufacturer sales to pull the trigger. New models often drop in the spring, which means last year's tech gets a price cut just in time for your summer purchase. You end up with a professional machine for a fraction of the original launch cost.
The 0% intro APR is a deadline, not a gift. If you still have a balance after the 15 months are up, the bank will start charging interest on whatever you owe.