I feel that child themes should be included with RTCamp premium themes like themes I have purchased from other theme developers. This will prevent feature questions on setting up a child theme due to it already being included with the package download.
With Inspirebook I had issues with setting up the child theme, widgets disappearing and had to scour for information in separate locations on how to set it up due to it not being located under Inspirebook > Docs > Child Theme for setting it up for this theme.