Late autumn is the sweet spot for Taiwan. The summer typhoons are done, the thick humidity clears out, and you can walk through Taipei night markets eating pepper buns without melting. Pair that with a ride on the old mountain trains through the misty cypress forests of Alishan, and it is easily one of the best trips in Asia.
A typical two-week run costs around $2,900 for flights, transit, food, and stays. If you do not want to empty your savings account at once, you can spread that cost across a year and a half without paying interest.
Keep in mind that 18 months is a hard deadline, not free money. If you still carry a balance when the 0% intro period ends, you get hit with regular interest on whatever is left. Set autopay to $161.11 every month from the start so you do not have to think about it.