Depends on the complexity of the scene and number of characters.
for a simple scene (like above) with 3 characters, the 3 min vid takes @ 35-40min @ 4k
with 6 characters, about 1.25 hrs @ 4k.
It will generate 10-12k images @ 4k (60fps) and an audio track that would then need to be converted to H265 video, which takes another 15-20min.
It's not an incredible amount of time, and I still can use the PC for work and other stuff while rendering, the problem was that I kept having physics problems with the higher character counts (5 or 6) that was messing with the dampers on the breast physics causing oscillating boobs that never stop moving.
The author of the physics script said there's no way that should be happening so i was on my own, troubleshooting it.
I had to tweak a setting, re-render, create vid, verify and redo if necessary.
I found that tweaking the physics sampling rate after calibration would STOP the oscillating, but then it would increase the damper too much and you wouldn't really know that until fully rendered and then converted to video.
So, trial and error but I'm planning on more GROUP dances, we'll see how that turns out..
If you guys can comment on what type of outfits are preferred, that might actually help.
Fantasy, ornate, flowy, sexy, armor?
I have TOO many options and it takes me a while to narrow it down.