Sheetrock A Garage - Debatable Idea

Project of the Day - Sheetrocking A Garage (Other House - Not Mine)
Hours Spent - 2.5
Money Spent - Gas to get to Friends House
Beginning Status - Garage was orginially sheetrocked partially prior to home purchase.  Sheetrock was only put where there was no exterior exposure - all outside walls were skipped.  The project was to patch in and repair the existing sheetrock and merge the new sheetrock with the old.  Plastic Insulation Vapor Barrier and Insulation was completed prior to my arrival!

Before Pictures:

We started going through the project pretty well in the first hour or so but then the problems started like a domino effect with the problems.  When we got to a location where the sheetrock was to butt up to the existing we came to the realization that some of the garage has 1/2" sheetrock hung and other areas had 3/4" sheetrock hung.  We decided - rather than to purchase multiple kinds of sheetrock for the different areas we would put a 2x4 in the wall and set it out 1/4" out to make up the difference where they met and that way it would be a gradual transition back to the 1/2" we were installing.

The next error was on my part - I started in a corner and hung two sheets of 4'x8' horizontal stacked on top of eachother and was not until I was going for the third sheet to the left of the first two that I realized the left side of the sheets were in between two studs and I could push them in.  Now we can not decide if we are going to scrap the 3rd and 4th pieces we cut and remove the 1st and second sheet to trim them back to the stud or if we are going to put a piece of wood in the wall behind the sheetrock to makeshift a stud location to ensure the sheetrock does not sink into the insulation at the seam.

The third and final problem we ran into which was the sign we needed to halt for the day was the decision regarding what to do about the garage door.  We are 90% sure we should just leave the garage door and all of the parts and pieces and sheetrock around this but we are not 100% sure yet so this is where we decided to retire for the day.

Progress (or lack there of) - 12 sheets we started with - 6 sheets hung - 4 sheets potentially need to be removed.  All in all, not a great day but a start at least.

 Progress Photos: To Be Added - Forgot to Take Them