Possible careers for people with disabilities?

I had some injuries several years ago and I've been on disability since 2004. I've tried a few part time jobs and I had difficulty doing those jobs. I've been working with Vocational Rehabilitation and they have had difficulty finding a job that might be suitable for me. I did 3 months of job training at Goodwill as well and essentially I had good work ethics and all but I had difficulty doing the job. So I'm trying to find something that I could be good at, and I've had difficulty finding what that is. So far the only thing I"m really doing is art work and photography but so far my income has been limited - but I'm gaining in recognition the more I show my art. But so far that income is limited.