I'm a part of a franchise that specializes in invoice factoring. This is where we buy a client's invoice(s), and their customer pays us. I'm looking for a way to market this sort of service. Seems to be the business we have right now is due to referral sources as opposed to marketing. Our clients tend to be those in the underground boring and telecommunication fields. I'm looking to extend to other fields to gain more clients/customers. Any advice on what avenues to take?