Many people have items sitting around their house that are in excellent condition, but they don’t have a use for anymore. A fancy dress you only wore one time.
As soon as you get 1,000 subscribers and 4,000 watch hours, you can start monetising on YouTube (oh, and subscribe to us, pretty please).

Yes- I personally know several people who do this as a vanlife job while on the road. They have a list of publications/ bloggers who they write for regularly, or who they contact frequently to see if there is any requirement. Some of them have more stable income than others, but they all seem to make it work. It's a bit like blogging in a lot of ways- the income isn't guaranteed.
Either way, having an interesting personality will go a long way in helping you develop a loyal fan base. Park Seo-Hyeon of South Korea makes $9000 a month by simply eating in front of a webcam on YouTube! James Wilson Jr (known as UberHaxorJames/UberHaxorNova on YouTube) makes between $175,000 and $1.2 million a year playing video games and adding his commentary while he plays. DisneyCollectorBR is a channel owned by an unnamed Brazilian woman that makes her between $1 to $8 million annually! She collects Disney toys and uploads videos of herself opening up the boxes, playing with the toys and explaining how each of them works.