When someone labels themselves as a dog or a cat person, they’re usually referring to their preference for the animal’s personality. No matter which pet you choose, it might be wise to consider the cost of a companion before making a final decision. Thinking about how much the pet will cost involves more than just the initial price — even if the pet is a free adoption. Making a head-to-head comparison is the best way to determine which one might drain your budget less over their lifetime.