i was doing full time printing ( back in the 80s ) for someone ( portrait photographer).
i was making multiple (custom) 5x7s and could print 12 at a time,
and doing 15 -20 negatives in a day easy. i was also making 8x10-16x20 fiber
prints ( maybe 3 from the same film ) at a time, but they took a bit longer to
come up in the developer so it slowed me down a bit ... it was a lot of fun.
that was all after processing the day before's 5x7 film
deep tank + hangers for about an hour and proofing too ...
all the film was consistant - she was in the front room and
shot everything with studio strobes, a packard shutter, and stopped down to the same fstop ..
and i made sure the film looked the same before it got retouched ...
we used to stick one of those heat rods in the developer, and i made a chart
for every degree above and below 68Âş --- some of her friends developed by
inspection, but eileen never did that ...
before i worked for her, i had never really done printing for anyone else.
i was taught by someone who learned in the golden years ( 1930s ),
and learned what good negatives print like since before that, i had only
printed from my own film, which looked nothing like "the real thing".
nowadays i still print jobs out, and it usally takes me about 1h / frame
that i have to print, unless they are all the same range, and i can guess
what the exposure will be ... this is all fiber paper, and they usually come up
about 45seconds after i dunk them ... i can usually finish a roll of 36exp film
in a day and 1/2, and make 4 prints from each frame ... i wish i had tray rockers,
it would make things a bit easier, but they are noisy -- really noisy ...
good luck! ( and have fun

)
- john