Picture the yard set up for a warm summer night, the projector humming, and the movie filling a huge screen while friends gather on blankets with snacks. Summer weekends book up fast, so the real trick here is lead-time. You want to lock in your rental dates before the prime weekends vanish, long before you actually plug anything in.
A typical rental package runs about $300 for the screen and sound system. Breaking that total down over time makes it much easier to handle while you are buying snacks and seating for the crowd.
Remember that the 0% intro APR is a deadline, not free money. If you still have a balance left when the 15 months are up, interest will kick in on what you owe.