S.C. Code Ann. § 44-7-1030

The board of trustees may also employ an architect to execute necessary plans for a hospital building or buildings and to supervise the construction thereof, if deemed necessary, and may contract for the construction of such building or buildings after receiving bids therefor according to the prevailing custom of receiving bids and letting contracts to the lowest responsible bidder, but may reject any and all bids until a satisfactory bid has been submitted.