Concerns about budget and planning a trip for aesthetic treatments in Korea

Hello, my name is Oil and I'm seriously considering going to Korea for my first aesthetic procedure. However, I'm currently worried about the budget and overall planning, as I'll need to allocate funds for round-trip flights, accommodation, and also figure out how many days I need to stay for recovery. Can anyone tell me how many days are needed from the first night until I can go out and walk around?

I'm still unsure about what else I need to prepare besides booking a clinic, or if I should book a short-term stay near the hotel. I'm also not sure about the total budget. Does anyone have experience planning something like this? Do you have any tips or things to watch out for that I might have forgotten? When are flight and accommodation prices cheapest? I'd appreciate any advice from you all.