I'd like to have a treatment in South Korea, but the budget and travel planning are making me a little uneasy...

Hi everyone, I'm Mengzhu, from Taiwan. I'm currently considering getting a beauty treatment in Korea, but to be honest, just thinking about planning the whole trip and budget is making me a little anxious. Besides the treatment itself, I also need to factor in airfare, accommodation, and food. I'm really unsure how to realistically manage my budget. Could anyone share their experience on how many days to allocate for such a trip? Is a day trip or a stay of about a week better?

I'd also like to know if you book your flights first or confirm the treatment dates first? I'm worried that if there are any unexpected situations or the recovery period is longer than expected, the whole trip will be thrown into chaos. Also, I'm not sure how long I need to stay in Korea. Is it unwise to fly back immediately after the treatment?

If anyone has gone through this process, that would be great! Could you share how to plan things smoothly? Especially regarding the budget, I'd like a clearer idea, although I know everyone's situation is different. Thank you!