Tom,
If I had the time to devote 4-6 hours to printing I would be in heaven. It is not the number of negatives. As it is, If I find myself with lots of time I look at the chemicals I need to mix and then blow it off and go take pictures. SO far my printing is done is short sputs on POP. No chemicals to waste time mixing, just dump, dilute. It takes me five minutes to be completely set up to print on POP. It took a long time to get one litre of Amidol developer ready. Where, in my small printing window, I can do three maybe four final prints on POP, I get one done in Amidol. That is not very economical because I may not be able to print for a couple of days or even weeks.
Unless I am missing something about the mixing of Amidol, I see no way to speed up the process.