On the Hyrel, Yoke positions 1, 2 and 4 are each 70mm apart, so three at a time would work if they were single material/color builds.

We typically print ABS and most materials at about 1800mm/min, or 30mm/sec. If you wanted 20 runs in 24 hours, that's about an hour per run. Depending on your model, infill percentage and layer height, this might be doable, but I think that's a little ambitious.

PM me if you'd like more information. See the video in my signature.

Thanks,
Davo