Where would be a good place near Daejeon?

‌Since my daughter is starting high school this term,
and we have lived in our current home for a long time,
we are planning to move.
We are a family of three currently living in a 24-pyeong apartment (worth 300 million KRW),
but we only have about 300 million KRW in savings.
The area we are looking at is around Dunsan (this may change depending on her high school admission).
I would like to move to a 30-pyeong range apartment,
but since we don't have the funds, we will likely look for a monthly rental or Jeonse.
The problem is that I have so many books right now
that I am thinking about getting a house in the countryside to use as a separate study.
(I'd go there once a week to rest, as I'm a bit tired of apartment living.)
Between Geumsan, Okcheon, and Gongju, which would be better?
I am also debating whether to buy, rent monthly, or go with Jeonse.
I'm worried that buying a country house might just become a headache....
To all the wise elders out there,
please give me some advice.
I feel like living in two houses might not be wise since money is tight,
but I truly have too many books ㅠㅠ