I hate the word passive, nothing is passive. There is always an opportunity cost associated with it. It’s not hard to get started but to be successful you need to work at it. People selling you on the passive income dream are the people to stay away from.
You can make it easier by hiring vaulters or service people but that's only once you scale up because you'll eventually have to pay a part of your pie to them and if you don't have enough machines you'll be barely making anything!