Late November is the smart time to hit Rome. Summer crowds are long gone, the air is crisp enough for long walks between bowlfuls of carbonara, and airfare drops significantly. You get to wander the Colosseum and the Roman Forum without thousands of selfie sticks in your shot.
A typical trip from the US runs about $3,500 all-in. If you do not have that cash sitting in a savings account right now, you can break it into monthly payments using the Discover it® Cash Back card's 0% intro APR for 15 months on purchases and balance transfers.
Remember that an introductory period is a strict repayment deadline, not free money. If you still carry a balance after 15 months, standard interest rates kick in on whatever is left, making your cheap trip expensive fast.