Depends on how you want to set up your business.  Since almost all of your work will be on the phone and on the internet, you can work from anywhere in the world.  It is best to start with a quiet room in your home. Make sure you don’t have dogs barking and kid noises in the background.  Ultimately, as you grow your business and add a sales person or other employees, you may want to find a physical space to call home for your business.