Worried about the beauty budget in Korea + planning the trip

My sister is currently considering going to South Korea for cosmetic surgery, but she's really unsure how much money to prepare for the entire trip. She's worried the costs will exceed her budget and wants to ask for advice on how others have planned their trips, especially regarding flight arrangements, accommodation, and recovery time.

She's confused about the best time to go (as she needs time to recover) and how many days she should stay. She's also unsure whether she should check prices before booking or vice versa. Does anyone know how to arrange a schedule that balances the procedures and allows for reasonable rest?

She feels a bit stressed because this is her first time combining travel with cosmetic surgery, so everything is uncertain. We hope those in the community with experience can help and share how they prepared and managed their expenses effectively!