Start with a mid level film. In my experience 3 separate levels is too much. A mid level film with a lifetime warranty and a premium ceramic option should be plenty. The bargain hunter looking for a $99 tint job is often not worth the effort. I would recommend 5%, 20% and 35% as they are the most popular. If someone wants something else then order it with a deposit on the job. Hope this helps and best of luck to you.