Repairing torn earlobes is a very common surgical procedure that can be done in the office. The cost will vary by surgeon, but in general, the cost should be in the hundreds of dollars and not more. I would consult with a facial plastic surgeon or plastic surgeon.
Closing the defect for a split earlobe is often straightforward and can be performed in the office under local anesthesia. Generally these procedures range between $600-1000, and it would be best to discuss your case with a specialist. Good look!