That is what I'm saying, a tool that does all that, should be a shop expense. I can't imagine every tech in an auto repair facility have a $4-$5K tool. I was a smog test and repair technician in CA. I never bought a scope for ignition tuning, never bought a smog test machine or a sniffer. Those are shop expenses. Just like I was an alignment tech for a short time at Firestone, but I never once bought an alignment rack either. I also never bought a tire mount machine of wheel balancer. Some things are just shop expenses. IMO, the scanner you speak of is a shop expense. You'll have to do mega work for many years for that tool to pay for itself. All you'd work for, is to pay for the tool, then it would be time to buy another up to date tool. JMO though.