Feeling nervous about an aesthetic budget trip to Korea... how much should I prepare?

Hi everyone, I'm Lestari from Jakarta and this is my first time seriously considering a trip to Korea for aesthetic treatments. But honestly, I'm a bit overwhelmed by the total cost—not just the treatments themselves, but also flights, hotels, how many days I need to stay, etc. I've done some Googling, but the information is so varied, and I'm unsure how to budget realistically.

If I may ask, has anyone here experienced a similar trip? How long do people usually need to stay in Korea for one procedure? What are the common hidden costs that pop up unexpectedly? I'm concerned because I'm working with a limited budget and want to be sure it's worth it before committing. Plus, what's the strategy for follow-up appointments—do I need to fly back, or can I have online consultations from home?

If I plan for next season, are there any months that are more cost-effective for flights to Korea? And can anyone offer tips on how to research trustworthy clinics without overthinking? I understand this is complicated, but I want to approach it thoroughly. Thanks in advance to anyone willing to share their experiences!