kevindoan it's not that we are asking users to purchase the extended license to change the source of the order scheduling module, it's just that we donot have time to work on that module to create that config settings.
If you can figure out a way to change the static/js files and find the 30min and change it to xx mins according to your business requirement, you can do that just with regular license.
@BiswajitNandi might be able to help you with this.