There are a couple of exceptions, but at the moment, it's going to be pretty hard to make a living from self-publishing. I think you stand a good chance if you self-help with a built in audience.
Personally, I write full time but I don't rely on the income from my print books alone. I write for magazines, self publish ebooks version of my titles, sell short stories, sell the audio and foreign writes, etc, teach. To make it full time, you need more than one string to your bow.