Worried about the budget for a procedure in Korea + need to arrange flights and accommodation

Hello everyone, my name is Jib and I'm Thai. I want to get a procedure done and have to go to Korea. But honestly, I'm quite clueless about the budget. I don't know how much to set aside because I need to cover the treatment costs, plus there are flight tickets, accommodation, food, and many other things.

Has anyone here had a treatment done abroad? I'd like to ask how many days are generally needed, from the initial consultation with the doctor, the treatment itself, and then post-treatment care. Do I need to come back for another round? I'm initially thinking I might need to stay for almost a week, but I'm not sure.

Another thing is, I'm worried about choosing a hospital or clinic. I don't know what I should research. Can anyone offer advice on what to look for to feel confident, and also about planning this entire trip? I have to coordinate many things. Honestly, I'm clueless, so I'd like to hear from those with experience. Thank you so much.