I ask this question because of what i've heard from my Autotech instructor, by the way I am NOT considering autotech as a career, I choose it so I can build my car for performance applications. Anyways he explained how he had to invest $27,000 in tools when he was an auto technician, which he further explained was nothing. He added on that the tool boxes to hold the tools cost about $20,000. I then researched their salary/wage , how their pay system works and I was appalled, FREE TOOLS wouldn't even convince me working as an automotive technician! At that moment, I had a better chance of joing the military than working as an autotech. These fears of ungodly expensive tools haunted me for months. So the question is how much would all the tools needed for commercial or residential HVAC cost? Total prices of low, mid, and high grade tools would help alot also! Thanks!