Advice on coding custom piece Topic is solved

[cREbralFIX]

Hi all,

I'm very new to Joomla and am considering using it for a pay site.  I need to create the following and am not sure what to do to implement it.  I'm not looking for code;  I just need the strategy.

1) User logs in
2) A button appears somewhere on the login page.  If the user clicks the button, another window (or area) opens with some text based upon a group (different groups get different text output). 
3) If the user closes the window, they cannot get the previous text again.
4) The user must pay in order to see the button.
5) The administrator has a way to add text and the database tracks the current record the user has access to.

How do I go about integrating a paid login with the above?

Is there a tutorial that demonstrates how to do some or most of this?  How would I connect the "user", "payment", and current text output together.

On the other hand, what existing code can accomplish this, if any?

Thanks