Picture a cool evening with a projector glowing against a sheet or screen. Getting there doesn't mean dropping $700 all at once.
By spreading your shopping over the next few months, you can hunt for sales on individual parts and keep your bank account balanced.
That 15-month window is a deadline, not a pass to spend money you don't have. If you carry a balance past that date, the regular interest rate will kick in and make your setup much more expensive.