Looking for houses in Korea

There are three ways of moving into living in a house in Korea. You can buy a house or you can rent a house on a monthly basis. And as a unique way of house rental in Korea, we lease a houses (pl) on 2-year contracts on the basis of every two years contract. And the cost for the lease is around 60% to 90% of for the total price of the house. Nowadays, I am looking for a house to live in. I am thinking about the lease, but in Korea, especially around Seoul, the amount of the house lease always lacks. lack always. 

I'm not sure what you mean "the amount of the house lease always lacks"? Did you mean "In Korea, especially around Seoul, there aren't many houses for lease" or "there aren't many houses available for lease"?