To-do-list joomla component (multi-customer and notification function)

I need a Joomla 3.x component/modules to create and maintain todo-lists per customer per location per user. (see attached Word document for a more readable version of description below) This is a short-list of the basic functionality needed to get started. If the project seems feasible a detailed description with mockups will follow. More functionality will be needed in the future, so a long term relation is preferable! *** Hierarchy • Website (Joomla) o Component (Administrator) • Client A (Manager A1) o Location/site X (Location manager K) ♣ User Q ♣ User R ♣ User S o Location/site Y (Location manager L) o Location/site Z (Location manager L) • Client B (Manager B1) • Client C (Manager C1) Multiple clients should be able to use 1 installation. Client environment should be fully separated. Managers, Location managers and users only have access through the frontend. (no direct joomla access) *** Front-end • Managers/Location managers can create and edit to-do-actions for users • Managers/Location managers can assign actions to users • Users have edit actions to certain fields. • Users can sort and filter to-do-actions in the to-do-list • To-do-list can be exported to Excel • To-do-list can be printed together with time/date and filter/selection • To-do-list can contain multiple fields (probably 15) o 1 unique id field o 3 date fields o 1 pulldown field • Status field (draft, open, done, etc.) o 3 pulldown fields • options are definable by administrator o 2 pulldown fields • filled with users (action takers) o 4 textbox fields o 1 checkbox field • Labels of to-do-list fields are maintainable by administrator • Possibility for the manager to replace the actions assigned to one user to another user (bulk action) • Import functions for importing a to-do-list in csv format (optional functionality) • Notification function: users/location managers should receive automatic mail when an action in their to-do list is about to expire (based on status and date field) o Mail should contain a list of the actions o Text of the mail should customizable • Manager can create Locations, location manager and users • Location manager can create users • Possibility to copy to-do lists from one location to another   *** Backend • Administrator can build/import to-do-list for clients/customers • Administrator can create managers, location managers and users • Log function for emailed reminders