Thinking about getting a procedure done in Korea, but confused about the budget and travel planning.

Hello, my name is Earn and I'm seriously considering going to Korea for a beauty procedure. However, I'm currently confused about the planning process. I don't know how many days in advance to book flights, where to stay, or how many days are needed for the entire trip. Has anyone been before and can offer some advice?

My biggest concern is the cost. I'm not sure how to estimate the budget, as it needs to include accommodation, food, flights, and many other things. Has anyone planned a trip from scratch like me? Please share how you set your budget.

Also, I'd like to know roughly how many days are recommended for a stay. I've heard some people go for only 5-7 days, while others go for 10 days, depending on the procedure. Does anyone with experience have any advice? I really feel like I need some guidance.