Just writing this post for information after returning from the hospital.
First of all, it is called a wheelchair/crutches/walker.
You can rent it by calling the local health insurance corporation/town office/public health center if there is a quantity available.
(Height can be adjusted to suit the patient)
It costs about 60,000 won at the shopping mall.
Because I use crutches around the house, I often feel uneasy and unsteady.
So I looked around and found that there are stores selling medical aids near orthopedic or university hospitals.
It is usually rented there for 10,000 to 20,000 won per month.
Everyone, please be careful of injuries.