As part of theme support all our clients can receive assistance with anything related to theme features, demo setup, bug fixing (if it’s the case). All client support if offered in our private client support system here – http://support.wpestate.org/
For new changes that you wish to add and that are not in the theme, we can offer limited support depending on your request. We have gathered several forum topics on where different functions are available in the theme so clients can modify/remove them. For new features we cannot offer specific new code without actually writing the new code and in many cases this is not possible without spending the time required for implementing the change. Complex modifications would still need to work with a custom developer.
We recommend to make any theme change in child theme and our theme is child theme ready.
Depending on the kind of change you wish to make, doing the code change may need complex PHP modifications to be overwritten in child theme and this implies that you also have experience in working with child theme for such complex changes.
If you are not sure how to make the change in child theme we hope these links will help. However please be advised that code modifications still require PHP, HTML, CSS, JS (basically wordpress code knowledge).