Is he still set on Catholic/Jesuit schools?
The problem even with full tuition scholarships is that they could still be unaffordable, if room and board are very high. Add transportation to that and the costs add up.
Unfortunately most Catholic colleges and universities are not affordable for low income students. We had a sad experience with a first gen student who had to leave his Jesuit school after one semester because his parents realized too late that they could not maintain that high of a debt. Problem was, after one semester he 1) would have been considered a transfer student, hence not getting as much aid but 2) could not get his transcripts released anyway because of outstanding debt!
Notre Dame, Georgetown and Holy Cross seem to be the most generous. Net price calculators are indispensable. Can you run some with him and his mother, print out the estimates and then help them figure them out? With a 31 he might be competitive at that level of schools.
One merit scholarship mentioned already is the BC scholarship is for room and board and tuition (if I remember correctly). I believe he would have to apply EA to be considered.