You go to New Orleans for brass bands in cramped French Quarter bars, chicory coffee at dawn, and gumbo that took all day to simmer. Visiting between December and February is the right move because you skip the suffocating summer humidity and the worst of the sweat, though you might need a light jacket for the evening breeze.
A typical trip runs about $1500 for flights, food, and a place to stay. If you want to spread that cost out instead of dropping it all at once, you can map out your payments so the total fits neatly into your monthly budget.
The 0% intro window is a strict deadline, not free money, and any remaining balance left when those 18 months are up will be hit with regular interest.