How to earn maximum with minimum investment in business?

If you find a way to 'earn maximum with minimum investment', then post it here so others can benefit !

The only way to make a living nowadays is long hours, hard work and discipline.

There is no simple and magic answer. If you find one, let me know because I could use that information in my business.

Work, lots of hard effort, if you can not invest a lot or money, then you invest time and work and work and work, to make up for it.