Do I need to book a hotel in advance for my first trip to Korea?

We booked 387 a night, and the average person is less than 200! ! At that time, I really wanted to stay in a homestay with beautiful ins style, but when we booked it about a month and a half in advance, there was no particularly suitable house. Beautiful ones are more expensive, and the cleaning fee is basically 89 1 night. The rooms in our budget of 500 yuan are very small and simple: 24 1, Nangye-ro, Jongno-gu and Seoul. When we picked it, we all chose Mingdong and the vicinity of Dongdaemun. /zd/ym