193591 Internal Membership Management

Okay, I'm going to try my best to describe what I need. I really need 2 things: I do remote technical support, so keep that in mind. I need a website that's secure (username/pw needed to login) on the back end. This will allow me to create usernames for customers. Along with that, I will need to create unlimited cases for each member that is created (either on my own or they can create it themselves on the main website). I will need a timer that I can click on to count down time. The time will be added automatically depending on the package that they purchase (there are different types of packages that can be purchased, if it's time then time will be added. If it's not time, this value is not needed). When they login under their username/pw on the main site they will see how much time is remaining and can purchase additional time. I'll have more to communicate, but this is a general idea of what I am needing. I dont know if mysql is needed for this or not to maintain usernames for each customer.