All you need is a mediocre computer, a good microphone, a good sonorous voice, good diction, the ability to read with expression and proper cadence and intonation, and some free recording software.
My father used to read for a major audiobook producer well into his eighties, and he’s no computer wizard. I think he used some software called Audacity.
Yeah, Audacity is what I currently use. From a practical standpoint, it’s a very low barrier of entry with regard to skill and cost, and only requires one person.
It would be a very useful thing to have these works more easily accessible, for example the 1619 Project. The more we know and the wider its known the less they could get away with.