I'm a little skeptical about this too. Yes, the new workstation will have two more A6000s in addition to the couple he already has, so it's going to be an insanely powerful rendering rig. But before he can queue up a render, he has to set it up, choose backgrounds and environments, place characters, dress them, pose them, set up the lights, etc. Make a 3D sketch of the scene, as I understand it. And that's where most of a developer's time is spent. So I have no doubt that his shiny rig's throughput will allow him to render quite more than 70 images a day, but the question is, can he feed the queue with ready-to-render scenes at this pace?
Just 5 minutes spent on each of 70 scenes will take 350 minutes or about 6 hours of continuous work, and many developers say that it often takes much more: half an hour to prepare a complex scene is quite normal. But there is also WiAB, which is being done simultaneously as stated
But there are also all sorts of experiments, with Blender, lighting, work with the music, detailing the script, writing dialogues, and so on and so forth...
In other words, I'll believe it when I see it