Speaking as someone who stumbled into marketing and lead-gen skills by way of something video-based, online, and not particularly lucrative (Machinima), I thoroughly and enthusiastically second patio11's "Bonus Points" section.
If you can build up a living wage from streaming games, you can make large sums of money in comparatively short order by applying those skills to areas where the value per customer is rather higher.
I've done reasonably well doing exactly that whilst also pursuing my passion (filmmaking), and I know people who have focused solely on the moneymaking side from a similar background, and have done extremely well out of it.
If you can build up a living wage from streaming games, you can make large sums of money in comparatively short order by applying those skills to areas where the value per customer is rather higher.
I've done reasonably well doing exactly that whilst also pursuing my passion (filmmaking), and I know people who have focused solely on the moneymaking side from a similar background, and have done extremely well out of it.