I'm not making a liveable living, which is why I have a day-job as a travel agent. I make a small amount on the side which allows for me to buy new minis and supplies... so everyone who has bought some of my work has contributed directly to Ken abuse.
More hints? I think the best hint is to do something different, that people want to buy and that you are really good at. Originality is still valued, and so is dedication to your craft, that comes through in your work I think and makes it more marketable.
I'd have to say that my current clients are likely people with an eclectic taste in interior decorating.