His father works away from home year-round, toiling hard to feed the family.
Tips
usage
Strong connotation of modest survival rather than prosperity - 糊口 literally means 'to paste the mouth', i.e. just enough to eat. Often paired with 辛苦 or 勉强 to emphasize hardship.
memory
养家 = support the family + 糊口 = (barely) feed the mouth. Together: just enough to keep everyone fed.