If you are interested in starting a professional modelling agency, you will need to begin by gaining as much knowledge as possible of the fashion industry. The fashion industry operates differently from other businesses, so you need to understand the differences in order to be successful.
You will need to grow your contacts in the fashion industry. You can do this by attending events such as Fashion Week in New York or Paris and meeting designers and models.
To have a successful agency, you will need to recruit good models, so pay attention to what sort of models magazines and television ads are using. Seek out models online who meet the right criteria and invite them to send you their portfolio. Once you have a good staff of models, you can use your contacts to find the right jobs for them.