They are not disposable. They are not commodities either. They are loving family members who depend on you to love and care for them forever. Most commonly kept pets will grieve when left behind or abandoned by their family. Take a good look at your lifestyle and your habits.
Some pets are more expensive to maintain than others.
Remember, animal shelters exist because people create the need for them. Do your homework. Take your time before making any decision. Pets do not make good gifts and all family members should be involved in a decision like this. We teach our children a lot just by how we treat and value our pets.