@Yeish_Meforshim, although you claim making a parnasah is a mitzvah, learning how to do so in a secular college (R’L) is surely a mitzvah Haba B’aveira!! @Nirah_Li, I heard about an institution in america that has a yeshiva and also offers a secular education. Perhaps look into that although it may not be hashkafically what your looking for, sound like its definitely your best option!
hatzlcha rabba in bringing your son back on the derech!!