I had also read that a couple of young boys from the Jain community became monks at a very young age leaving behind lucrative career and business.
So, there is no age for detachment from worldly affairs. The sense of detachment and call from the Almighty to leave the worldly affairs can come any time.
“Khamosh rahoon toh mushkil hain, keh doon toh shikayat hoti hain" (It is difficult to remain silent; But if I speak, they complain.) --------- Saba Afghani
But I have seen people even at their age of 90s thinking about family and other things. So there is no fixed age at which one should detach himself from all worldly affairs. Some may do that as early as 55 years and some may not even be in their 90s.
'Idhuvum Kadandhu Pogum "
Even this challenging situation would ease
"Life is easier when you enjoy what you do"