My colleague and I worried about the same things back then. It turned out that because we imposed hard constraints on ourselves, we fairly quickly built a system that we could run under those constraints.
Particularly the office hours offers... We had a feeling not many would take it up, but we were not sure. But we were also not sure if we could pull it off along with our day jobs. At the end of it all, our guess was correct.
A reason I decided to publish it is because it was not exhausting! That's part of the "unwitting" part :D
Also, being able to make the steps ourselves was key. I expect nothing but exhaustion and disaster, if those hard constraints are imposed on any pre-existing hiring loop, and the interviewers have no say in tweaking the system.