Reminds me of a guy I met once. He ran a small auto repair shop focusing on a single brand (Audi, AFAIR). He had a special device to talk with cars' computers and a laptop for it with software and appropriate keys. He explained to me that getting this from the auto manufacturer would cost a small fortune; instead, what he did is contract with some Chinese people, who from time to time would RDP to the laptop and update whatever in that software that needed updating; with the interface that I think was probably second-hand also, it apparently costed only a fraction of what manufacturer would want.