@musai: Do you have a portfolio for people to check out? And if so, is it in a public place so that ordinary users can find it and read your work? If you are going straight to the editors of sites looking for jobs through help wanted adds I don't see that being the best way to go based on all of the reasons you already mentioned.
I mean you have to know that you are competing with free right now. There are users on this site that are contributing loads of free content to the community spotlight, front page promos, and just general day-to-day forums. Some of those writers, like @video_game_king and myself (on top of loads of others I could shout out) are writing consistently, writing in depth, and writing for no reward beyond having a few people read our work. It is really hard to look for a paying job when there are tons of writers doing what you want to do as a hobby.