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

we booked 387 a night, and the average person is less than 2! ! At that time, I really wanted to stay in a homestay with beautiful ins wind, but when we booked it about one and a half months in advance, there was no particularly suitable housing. The beautiful one was more expensive, and the cleaning fee was basically 891 nights. The room location within our budget of 5 was very small and simple: 241,Nangye-ro,Jongno-gu, Seoul. When we chose it, we all chose Myeongdong and near Dongdaemun, which belonged to the center of Seoul. /zd/ym