384125 Online tracker required

We have a property letting portal website and require a tracker to allow us to track staffs tasks and work, ach task will be allocated an estimated time and a user. the user will be sent emails stating what is still to outstanding for the day and how long they have spent daily workiing on the tasks. some tasks are allocated dates and the emails will also state what tasks are getting close to the date deadline. i have attached a spreadsheet detailing all the fields i wnat aded (there are a lot of the property ones already on the site). Please read everything BEFORE replying as i will only respond to serious programmers