An electrical contractor is a business that deals in the installation and maintenance of electrical equipment. There is no difference between an electrician and an electrical contractor other than an electrician is a person that is qualified to do the electrical work and an electrical contractor is a business generally employing the electricians to do the work.
Like any business, this can vary widely depending on competition, market size, reputation, and experience. Some companies do well over a million a year while others struggle to survive.
Choosing the right electrical contractor is probably easier nowadays than ever before. We live in a digital world where you can research potential companies before you even have to pick up your phone. A few good ways to choose an electrical contractor are looking at online reviews, researching BBB complaints, word of mouth from your friends and family, as well as asking for recommendations on social media sites.
Although being an electrician is not a bad paying job, it is not easy to become rich working as an electrician.