Success in SFI without investing is certainly possible
but it is not the easiest way, it's the hardest way and only for the tenacious.
How SFI without investment:
Do every day daily tasks.
Learning Launchpad and use the launchpad tips.
And use the Launchpad tips every day.
Create your own blog, about making money, and to be an entrepreneur.
Work every day and look after three years, how it is with the income.