I think the biggest problem with answering a technical how-to question is that there is no way of knowing if they understand your directions. They might listen intently, and nod their head as if to understand, but when installation time comes, I bet more questions arise (now, which was the line, and which was the load again?). Unless I am involved in the follow-up or completion work, which would allow me to inspect the DIY work, safety considerations would prevent me from giving advice. There's just too much room for error.
Most of us see horrendous installations on a regular basis, and read about the life lost due to electrical problems. It is not worth putting the lives of your children at risk in order to save a few bucks.
It is better to know WHY things are done certain ways, not just THAT they are.
