You don’t need to create a new child theme for the BizGrowth PRO theme. You can use the main theme as it is.
After your purchase, kindly install and activate the BizGrowth PRO theme
and Go to the Appearance -> Theme Options to customize the theme
You can use all your previously created post and pages to create a beautiful and professional website using BizGrowth PRO theme.
If you will have any questions regarding Bizgrowth WordPress themes, you can contact us through our support forum or you can mail us. Our support team is always ready to help you with any problems of customization.
Please take a look at this
Theme : http://gracethemes.com/themes/bizgrowth-corporate-wordpress-theme/
Demo : http://gracethemes.com/demo/bizgrowth/
Documentation : http://gracethemes.com/documentation/bizgrowth/
Showcase : http://gracethemes.com/showcase/