What is the ideal choice to move from kaoshiung to hualien? and what is the cost for each?? please

By train: you may choose Chukuang or Tzu-Chiang Train to go there directly: the former takes 5-10 hours and costs 545NTD and the latter takes around 5 hours and costs 707NTD.

By bus: At Kuo-Kuang Kaoshiung General Bus Station, you can take a bus to Taitung first and then at the nearby Dingdong Taitung Bus Station to transfer to another bus to Hualien.

Well, comparatively, you are more recommended to travel by train!