Good luck with the finals. My buddy is also going through the same thing. But you want to talk about busy, he has job at night, is a TA so has to grade papers, and on top of that he has his own papers to write for class. The price though to get a PHD, I would never do that.

AT least working for your dad is what yoru studying, correct? so you are getting some real world experience. That is always good.