Your images display a great deal of sensitivity toward the subjects you photograph. From my experience, some of them may be relevant to magazine market as well. Have you ever thought about that? Fortunately, you do not have to invest a lot of money. The first photo I sold was taken by a 4Mp Nikon Coolpix. What you really need to do is to find an appropriate magazine for your images. There are a few really good books and websites on the subject if you go looking. My suggestion is to check one of them - http://www.freelance-market.net - and try a couple magazines until you find out what can really work for you. And certainly don't be discouraged if your images are rejected or not used. After all, it’s fun!