Nashville on a Tuesday hits different than a Saturday night. You can actually get a spot near the stage on Lower Broadway, hear the writers rounds in Midtown without waiting in a line around the block, and grab hot chicken without losing half your afternoon. Hitting the honky-tonks on weekdays also keeps your flight and hotel costs well below weekend peaks.
A typical trip runs about $1600 for flights, a central stay, and plenty of live music. Spreading that total out over time makes it easier to swallow, but you need a solid plan so you are not stuck paying for last month's memories long after you are back home.
That 0% window is a hard deadline, not free money. If you still have a balance left when the 18 months are up, the standard variable APR kicks in on whatever is left over.