User Activity

How many working hours would you say it takes to get Marketing Pro up and running? I heard it was a lengthy process but I would like to start using it ASAP if I have the time to spend right now working on that.
Can I schedule an email marketing campaign for the same day? Or is it only possible to schedule it for the next day?
Is there a way to set up a plan for a customer to pay monthly on an invoice? Non Membership.