I live in a family of 4, we have 5 cats, and a Siamese fighting fish. Cats are all of different ages, from 7 years old to 10 months old.
Also planning to add a pure-bred German Shepherd to the family soon. They are quite expensive though, $1,800+ & about $3,500 a year in maintenance,vet bills,food & whatnot.
Our cats run us about $300< a month & about $1,000 quarterly (additionally) for vet bills.
We sure do love our pets!