Invoicing and Retainers for EDesigners

Not all edesigners charge via packages - I charge with retainers so I don't lose income if my time goes over. It is not inclusive to not having that feature in the edesign package, and basically forces those of us to don't charge in packages to either upgrade (when we are not full service designers) or change up our processes - some of which we have had in place for years. Please upgrade the edesign package to include invoicing and retainers JUST LIKE THE BASIC introductory $35.99 DF used to have.