Going back to school is a huge shift, and the costs hit fast once you get that acceptance letter. You have until winter to get your finances in order for an autumn start, so start tracking your tuition bills now to avoid a scramble.
Timing is everything when you are dealing with a $15,000 bill. If you map out your payments early, you can avoid the stress of a lump-sum hit right before classes begin.
Remember that the 18-month window is a deadline, not a gift. If you have a remaining balance when the intro period ends, you will start paying interest on the leftover amount, which can get expensive quickly.