Client system sit in magento

I want to establish a customer/ client system that sit in the Admin panel of magento. To do this I need a developer to build me such a system that when a man put credit card details in magento one checkout page - payment is entered in the fields of credit card and actually entered automaton to my account on PayPal - or, if he enters PayPal account information- then (if there is confirmation by PayPal that the money was received in my account) automaton script creates a username and password to the email he stated on the customer's one checkout page at magento, and send email for user that the account was created with his username and password in it. Address to the second system I build- client login system- (I will give the developer the address) need to be there too. The system need to sit in the magento database I need to be able to install the "client system" as an extension. Easy and simple. Magento system must have an area where I can see all the registered customers and there details. I should see the following in a table: 1. Customer's Name and last name 2. Phone Number 3. Email 4. Buyer paid by what? paypal or credit card (must be shown PayPal account of his email). If the customer paid by credit card - should be presented four last digits) 5. Date and time of purchase I need to have the following options: 1. The product that I provide is renewed in annual or monthly. I need this option it will be sent an automatic e-mail client license renewal 10 days before its license expires. If the customer did not renew license - the customer's login information will be deleted automatically from the database (but the name of the user and his email will remain in database-again - no login details (username+password) are in the database management system for customers) 2. I will be able to delete customers. customers can be deleted completely (even from the database). 3. I need to be able to change the names, phone number or email address (it will be synchronized with the database if I change it in the "client system") 4. Possibility of sending an email from me to all customers with a single click, or, deliver message to one email address Additional information - later