There's no easy way around it, being creative for a living can be challenging. I've adopted Mike Rowe's idea that you should never follow your passion, but still, always carry it with you.
The key to creating quality content as a means to any end - direct marketing, indirect marketing, sales, catharsis, or just art for art's sake - is being passionate about it. While it's probably not best to commit to only creating for creations sake, if you want to make money doing so, that is where it should start.
There's no easy answer, and to be honest, I don't have it. BUT, here's some advice anyway!