I'm developing a shopping cart system for a conference and we have two different prices for tickets ... one for regular and the other for students. I want to be able to control the tickets so that I do not sell more tickets altogether not having to set limits for students and regulars. I was going to have one SKU shared by two products with different prices. Am I going to get into difficulty doing this?

Also I have one product that is a package of some of the others ... is there any way that I can adjust the other levels rather than having a level for that package?