Typical.....Yes for mills. Acceptable.......IMO No! I would steer clear of any of the dogs bought from this place, the dogs may be fed and watered daily, maybe even cages kept clean, but one would doubt the likely hood of animals checked reguarly for health issues, particuarly heriditary ones. After all you think about how much it costs to check one animal over, do you really think this lot would put the effort into regular checks for 60 or 70 animals?
It really does sound like you visited a typical mill. Having dozens of diffrent breeds is only one of the first indicators of a money hungry, dog mass production line
Given that you have location details, is it worth mentioning it to your local RSPCA (or SPCA isnt that you have over there?) Just to be sure that they are aware of them and the conditions. Probably not alot they will do, but at least you have then done what you can by atleast reporting what you have seen.