Planning a Tour

It's exactly one month until Gav and James hit the road for their maiden live tour which puts them in the unfamiliar shoes of the artist for the first time. But what exactly goes into planning a tour? Why is a tour manager important? Who is doing the driving and in what? How do you know how much merch to order? And please explain that 80/20 Vs deal again... In usual 2 Promoters, 1 Pod fashion, it's all laid bare, including how much promoters are paying for the pleasure of our company....