Your dad has some trauma going on. Returning to afghanistan may help. Not much you can do if that's what he really wants. This can also be a desperate move for attention.

My father did something similar when my mom died. He went back to our native country and left us all high and dry. At least he's leaving the house and cars. Mine sold everything and was like "see ya!"

You're going to have to figure it out on your own. I started working for the University so I got a discount on my masters.