I won't get into the horses, but we have two dogs, six chickens and a sparsely populated 60 gallon aquarium.
The dogs are actually pretty cheap. They do great on CostCo dog food, and aside from the original vet bills when the older dog showed up in my front yard with a broken leg, and also required spaying, they have been pretty cheap. The older dog is 12 now, and the younger one is 8. The older one gets joint supplements for arthritis from the broken leg @$20/month, and we had to buy a bark collar for the younger one recently, for about $100.
The hair is really the worst thing, and the older dog is the worse offender, being sort of a lab/pit mix. The younger one we believe to be Border Collie and Curly Coated Retriever, and his hair is much more manageable.
The costs don't bother me at all. I won't run bills into the thousands on surgery and such for them, especially towards the end of their lifespans. The younger one is my alarm clock and running buddy, and the older one is an eternal optimist and I would hate to be totally dogless.
OTOH, we used to have two cats, and again with the hair, but I just didn't get as much out of having the cats around. Now that they are gone, I don't intend to own cats again, for various reasons.
The chickens more or less pay their way with eggs, and they're kind of expendable, so I don't really think of them as pets. In fact right now I'm thinking of applying for a detail out of state, and figure I'll just give away the chickens and get new ones when I get back in the spring, easy peasy.