Is the father's 'aqiqah sufficient for his son when the latter does not possess enough money for it?

The 'Aqiqah for a newborn is a confirmed Sunnah upon their capable father. There is no impediment for their grandfather or a benefactor to perform the 'Aqiqah on their behalf, especially if the father is unable, and by doing so, the Sunnah is fulfilled. The Sunnah is to sacrifice two sheep for a boy and one sheep for a girl.