Client management

I need a website that allows clients to log in and modify 5 attributes(variables) in our member database. These attributes are separate from the standard editable attributes. It must provide payment options? and email invoicing. It doesn't need to be fancy, it just has to work! ## Deliverables I need clients to log in securely and be able to modify attributes from our member database. I need a online payment option (not recurring). I need a home page, a log in page, and a user agreement (legal) page.