Help with creating users/ members account

Hi I am trying to create a website for our business. The business involves transfering our current investors online and seeking new ones online. I need help with

1. In our business user’s are investors, so i want to be able to show them their orignal investments, current fund value, add or withdraw funds options, graphs on their account page. what Plugin will be required for that.
2. Is there any way i can just type in the percentage of returns to the whole fund and all the investors’ individual accounts get updated accordingly ?

The page I need help with: [log in to see the link]