some questions

hi guys may I ask for your help regarding certain things I need to know.

First if any of you have worked in a sort of hangar environment can you tell me what kind of people work there like engineers, technicians, etc. some sort of work hierarchy.
Do you know how long it takes for a complete overhaul of say a light business class jet and an estimate of expenses, required personnel, etc?
Do any of you have any idea how much a rolls royce AE3007C1 turbofan costs?

thanks in advance