If the board of hospital trustees and the owners of any property desired by the board of hospital trustees for hospital purposes in the county or counties where the county hospital is established cannot agree as to the price to be paid therefor, the board of hospital trustees shall report the facts to the board or boards of county commissioners. Condemnation proceedings shall be instituted by the board or boards of county commissioners and prosecuted in the name of the county or counties by the district attorney for such county as may be concerned.