Medical tourism to Korea - how to plan a plastic surgery trip?

I am planning my first medical tourism trip to Korea for plastic surgery (rhinoplasty + double eyelid). I am feeling overwhelmed by all the planning involved. Can someone share a step-by-step guide on how to plan a plastic surgery trip to Korea? How far in advance should I book consultations? Do I need a medical visa or is tourist visa sufficient? How do I find accommodation near the clinics in Gangnam? Should I hire a medical tourism coordinator or can I manage on my own? How much extra budget should I plan beyond the surgery costs for accommodation, aftercare, etc.?