
Welcome Binnie girl, as you have found there are dog forums (one in particular seems to be full of Back Yard breeders and small scale puppy farmers) and then there are 'Dog forums' like this one.
No your gut instinct would be correct. I cannot see why any reputable breeder would breed that many liters, even if several members of the household were all involved in different breeds, that level of breeding can only be deemed commercial.
In fact any breeder that breeds more than 4 litters in any 12 month period is required to be Licensed by the Local Authority, and such breeders are not permitted by law to allow any bitch to have a litter in under 12 months from the last, so that puppy producer (I won't dignify them with the term breeder) is breaking the law..
The kind of breeders that most consider reputable will generally have no more than a couple of litters a year, and often less than a litter once a year,a s there are few breeders worthy of the name that keep large kennels of dogs.
Certainly in my breed those breeders who had kennels when I first joined the breed had fewer than 4 litters in a year, and most had 1 - 2, with others just the occasional litter every few years, but then mine is not a commercially sought after breed that is readily salable to the casual puppy buying public.