I'm surprised there is no mention of the Raptor Talos II, which is designed to be auditable in exactly this fashion.
For the workstation: https://www.raptorcs.com/content/base/products.html
Fantastic machine, but sadly still 2 or 3 times as much as many people, including me would spend for a workstation.
Therefore, I wanted to know the car make/model. Because $6,000 for a decent run-of-the-mill car isn't bad.
https://www.devever.net/~hl/ortega https://github.com/hlandau/ortega https://github.com/meklort/bcm5719-fw https://news.ycombinator.com/item?id=19679640