The Dream to have a baby
The situation regarding Chozen has nothing to do with financial matters at all. Although Chozen’s parents did not come from wealthy families, they were able to provide a life that was satisfying and enjoyable for Chozen and his siblings.
The only issue was that Chozen was not their biological kid. Because of this, he did not have an appropriate upbringing, and his parents did not show any affection toward him. When they finally accepted the fact that they would never be able to have a biological child of their own, they decided to adopt Chozen.