This isn’t easy passive income. This takes effort.
Even if you were to set up a "passive" income stream, THAT process takes an enormous amount of effort.
Listen to @getonthetrain, folks...the only way to get rich is to do it yourself.
- you can try to do something that is fun for you, but don't sink a lot into that approach until you know whether it is profitable or not
- whatever you intend to do, research it a bit. you don't need market reports necessarily (they can help), but look around the local market for similar businesses and hit the forums
- who is John Galt?
Starting with $100 is a pretty good way to do what @stevescoins is talking about. You won't have too much invested if things don't work out, but if they do you can always use your profits to reinvest into your budding business.