Good question!
My advice is to have a good team at first. A team that will work hard and work every day. After you build it, than the best way to make money out of it is to set up a Standing Order!
Why Standing Order? Well, everything you earn from your team won't be enough until you are Team Leader.
Investing in this job is most important thing because this is your own business and success depends of how much you're willing to invest.