How does Sarah penn get the idea of moving into the barn?

In Willa Cather's "Neighbor Rosicky," Sarah Penn gets the idea of moving into the barn after reflecting on her family's needs and the desire for a simpler, more fulfilling life. The barn represents a space where they can connect with nature and each other, away from the pressures of their current living situation. This decision symbolizes her longing for a more harmonious existence, aligning with her values and the realities of rural life.