A real sim racing cockpit with a direct-drive wheel and solid pedal set is a long-term investment meant to last you five to ten years. You want to buy once instead of upgrading cheap gear twice. Hardware manufacturers usually drop new gear right before the holidays, which means last year's flagship gear gets steep discounts in November even though it performs almost identically.
If you shop those holiday bundle deals, you can land a complete setup for around $1200 without draining your savings account in a single day.
A 0% intro APR is a hard deadline, not free money. If you still have a balance on the card when those 15 months end, regular interest rates kick in on whatever balance is left over.