This is a difficult question to answer because it depends on a number of factors, including the ages of the family members, the type of health insurance coverage they have, and whether they receive any subsidies.
According to the latest data from the US Census Bureau, the average health insurance premium for a family of three in South Carolina is $1,520 per year. However, this is just an average, and your family's premium could be higher or lower depending on the factors mentioned above.
If you'd like to get a more accurate estimate of your family's health insurance costs, you can use the Kaiser Family Foundation's Health Insurance Marketplace Calculator. Just enter your family's information into the tool, and it will give you an estimate of your premium and subsidies (if any).