Worried about costs and planning a trip for cosmetic procedures abroad

Hi everyone, I'm Nhung from Vietnam. I'm considering going to South Korea for a cosmetic procedure but I'm really unsure how to plan my finances effectively. I have an idea of what I want, but when I add up all the costs (flights, hotel, food, + procedure cost), it feels a bit overwhelming. Has anyone who has had a procedure abroad before, could you share how you planned your budget?

I'm wondering how many days would be enough. I've heard that time is needed for follow-up appointments, but I'm not sure how long that typically is. Can anyone with experience tell me the usual length of stay? And when looking at flights, the prices vary depending on the season, so I'm also confused about the best time to go.

I'd also like to know if anyone has tips for saving money? Like where to stay that's cheaper, where to eat, or if it's possible to combine it with a fun trip? I'm not wealthy, so I need to be very careful with my calculations. Thanks in advance, everyone!