Autumn in Dublin hits just right. The summer crowds thin out, rain taps on pub windows, and you can pull up a stool for an evening trad session without fighting elbows. You go for the fiddle music, the quiet corners, and the pints.
A solid week runs about $2400 from the US once you factor in flights, a place to sleep, and pub tabs. If you do not have that cash sitting idle today, you can pace it out cleanly over time.
Keep in mind that 0% intro interest is a deadline, not free money. If you still owe anything when the 15 months wrap up, regular interest kicks in on the remaining balance, so stick to the monthly payoff schedule.