To make the process of adding elements like columns and pricing tables easier for the end user we have included our own extension. Meet Demente Type! You will get an extra button for the editor. When you click on it you can choose the element you want to include, set the options and add it. You only have to pay attention to where your cursor is placed because that's were the new element is going to be placed.
For example pricing tables have more elaborated markup than other elements. But have no fear because even without HTML knowledge you can use this extension to add them to your article and then you can simply replace the placeholder text and edit them using the standard editor tools.