Look we ain’t crapping on your ideas so much as saying that they are not the way to go.
The problem with an AI system is it has no idea what you are truly looking at and trying to get an answer for and the owning company will be feeding it service information that is oftentimes already hard to understand (the Engrish translations you get with cheap consumer goods also happens to an extent at higher levels). My dealer’s prime OEM is infamous for writing their manuals in strict Engineerish as well. While I’d appreciate a simpler system I also don’t trust a third party to correctly convey the information, especially given the mistakes and such I’ve seen in the parent information.
As a dealer mechanic solving complex system issues I spend a lot of my time with schematics, system operation write ups, and parts diagrams. Your AI or talk to a tech ideas might sound good to you but being there in person is about the only way to truly investigate a problem and learn a system. I can tell you translating a hydraulic diagram to what’s actually on the machine is not easy and is not going to be grasped by someone miles away and is damn sure not going to be grasped by an AI system. Most of my day to day stuff is very hands on for a reason.
We also often work in loud environments and trying to have phone conversations doesn’t work well. And I can tell you from trying to get anything done with my phone’s Siri and my house’s Alexa not only would I not pay for such a service if my boss told me I had to use it I’d probably quit. I have enough rage, I don’t need more.
The diagnostic software idea mentioned earlier has far more merit especially if you add in an optional service to remote in. Your issues would be doing a ton of programming to crack it and then you’d most likely lack volume for sales, which is a big barrier. The reason you can buy $30 code readers for automotive is the standardized systems and the sales volume is extremely high
The most in demand stuff I know has pirated copies floating around. You may also run into regulatory issues concerning emissions.