I'm not sure there is such a thing as a "typical" cattery. For instance, our cats are our pets, and live entirely in our home. I've been told by many that visit they cannot smell cat urine, though I am always certain I can catch a whiff or two, lol. A home cattery that keeps intact boys inside may very well have a strong urine odor, no matter how much you clean. Our first boy was a spraying machine, and I cannot tell you how many hours I spent cleaning and agonizing over the smell....I am very fortunate neither of our two current boys spray, but one of my intact girls does spray. We generally have 3 to 4 adult cats at any given time running together, and when our babies are around 6 weeks old, they are allowed to join the general population in our main living area. We also have a large kitten nursery and another large bedroom upstairs for the new moms and babies, but have had moms who prefer delivering and raising their babies in the computer room in our main living area. While many breeders do their own vaccines, I choose not to, and have those done by my vet so the kittens can have two vet health checks along with their vaccines, more for my peace of mind than anything else.
In general, I would say that a home cattery that is clean overall (no dirty litter boxes, clean water and food dishes, areas free of clutter, floors swept or vacuumed, a slight smell of urine but NOT overpowering, etc), along with a few cats and/or kittens that may be running freely who appear healthy, well-fed, friendly and happy..is the "norm" I know first-hand. For those catteries whose cats are in enclosures outdoors, the same should apply....