Nervous about budgeting for treatments in Korea, how do you plan everything?

Hi everyone, so I'm seriously considering aesthetic treatment in Korea, but honestly, I'm a bit overwhelmed by the cost. This is my first time going abroad for a treatment like this, so I don't know exactly how much to budget. Besides the cost of the treatment itself, I also have to think about flights, accommodation, and how many days I'll need to stay there. Has anyone experienced this? How do you plan everything without stressing about the budget?

What I'm wondering is: how long do people usually stay after treatment? Do I need to stay a few days before the procedure for a consultation, or can I go straight away? And regarding accommodation, is it more economical to stay in certain areas, or is it the same? I'm also not sure if I have to account for days off work or what the most convenient timing is.

I've tried searching online, but there's so much information, and I'm confused about which ones are accurate. If anyone is willing to share their step-by-step experience in planning their trip, I'd be super grateful! Especially about how you managed the budget without overspending. Thanks in advance!