As far as I know, in order to do any ]import business in Ghana as foreigner, you should invest at least USD300,000. You can visit GIPC(Ghana Investment Promotion Centre). If you can meet this condidtion, you had better consult with GIPC. They will help you to set up your business. Because of this condition, For export trade, no need any investment. In case of joint business with any Ghanian, minimum requirement will be USD10,000. If you want to do manufacturing business, you need minimum USD50,000 to meet GIPC requirement.