I hang all of my doors! We even make our own raised-panel, Shaker style doors. Rarely do we order prehung doors. Our doors are hung "just so". Here's how I do it.
I set up a lazer level with vertical and horizontal lines. My hands are free! I put the door frame in the opening and install 8 stop-blocks. The frame is held in place and my hands are free. The benefit here is that the door lies in the plane of the wall (my walls are always plumb). I can move the frame sideways and up, but it always remains true to the plane of the wall. I fasten the hinge side to the shoulder stud using shims and screws. Screws, not nails...you hear me? ;) My fasteners will, eventually, be hidden by door stop. If my door ever needs adjustment I only need to remove door stop.
With the hinge side secured, I hang the door back on the frame. Now, like a piano tuner, I fine-tune the frame to fit around the door. The reveal all around is always the same. It is a balanced installation. It is beautiful. Best of all, should the need ever arise, I can access my work quickly, without damage to the wood work.
How many can I install in a day? About 8. Routing the door frame for hinges and strike plate, joining frame pieces and placing the door in the frame takes 1 hr of my time. Admittedly, this is not the "mass production", save money, helter-skelter building technique I sometimes see in my area. The rewards for thoughtful door installations are many. Call-backs are rare. What thinkst?
Mel Fros froscarpentry.com