M.R.
I know a girl who just had a baby a few months back and she is working online rating Google searches. I had never heard of it, and I don't know how you get started. But she said she just had to take a test of some sort and now she is working for $15/hr, on her own schedule as much or as little as wants.
I like the American Girl clothes idea. That stuff is crazy expensive, so I would think homemade stuff would be cheaper and since they are dolls, you could start with a minimal amount of fabric & other start-up expenses until you see how well it is going to work out.