Complex sentence: In these states is not uncommon to see towns where men are absent, ans supposed to be working in the United States and women take care of their children, while husbands send money (dollars) to their families in Mexico.
Split into simpler sentences: In these states is not uncommon to see towns where men are absent, and supposed to be working in the United States. While the women take care of their children, husbands send money (dollars) to their families in Mexico.