TIL that choosing a $400 Fluke multimeter over a cheaper generic one saved me three hours of troubleshooting a faulty ARINC 429 bus last month. | Avionics Technicians - Freelance Forum - The Community for Independent Professionals
Exactly like your scope paying for itself. I fought with a weird CAN bus issue for two days with a basic scanner. Bought a nicer one that could actually graph the data, found the faulty node in twenty minutes. That kind of frustration just isn't worth the small savings.
Honestly, people forget the mental cost. A cheap tool that gives you junk data makes you doubt everything, even the good parts of the system. That brain fog wastes more time than the tool itself.