What is the main idea of the second chapter in Breaking Through by Francisco Jimenez?

The title of the chapter, Home Alone, certainly reflects the main idea of the chapter. In Chapter Two, the boys had to return home pending immigration visas for the entire family, as only Mama, Roberto, and Francisco had thus far been approved. Money was an issue, and thus, the boys went home, as Roberto was the only family member with steady job. Chapter Two details their time alone and away from their family.