[xlr8or]

David,
Sort out the Skilled, Semi-skilled and unskilled labor used to build your car. Take as much of the semi/unskilled task and labor cost out as you can and see if it would be cheaper to pay someone to box up parts than to pay that labor to a gearhead with a clue that you pay now.
In my opinion a good set of instructions will allow anyone with a desire to build the car the ability to accomplish the semi skilled and unskilled portions without risking quality.
Factory Five has taken this idea to the extreme and allows the customer to do everything and others are somewhere in the middle. I think the difference between the nice cars and less than nice ones is mostly related to fit/finish.
Don't give up control of fit/finish and you don't give up control of quality.
Unless people know my particular situation they will have no idea if I put the bolts in or if Jeremy did it in your shop. A simple picture of here's what it should look like and here's what to torque it to will keep it easy enough for those that want to do it without risking quality.
There is no way to idiot proof it but your manual will go a long way toward that goal when it's finished. Whats there now is well laid out and easy to follow.