Unless you intend to hire the people to do the work, in which case you will probably go broke before you get a clientele established, you have to become a plumber which usually takes five years. And then you have to be a plumber for about five years to get the experience that most jurisdictions require for a contractors license.: i am interested in starting my own bissiness in plumming and want to know where in north carolina can i be trained and what do i do to get started