Yes, your idea is very good and unique. A business card contains small but all information about any business. You can lead through business cards in your business. Every business contains business cards whether they are a lawyer, doctor, real state business, travel business, restaurant etc. My brother is a lawyer and he opened a new lawyer's office. To get a lot of clients he creates a business card. A solicitor business card may be picked anywhere. For this, He selects the advocate business card that can speak about what kind of person he is, and what he can do for others. It all depends on the type of card you select. After selecting the card you need to decide what to write on it and type of fonts, colors and other stuff that are to mentioned on it. You can design information on business card according to your business.