Medical transcription is the best job for a stay-at-home Mom. I have been doing this for the year of 2000, and made $13,000 working approximately 20-25 hours per week. I took a course from CareerStep.com and then worked as a subcontractor for someone locally. CareerStep offers job placement assistance (for a fee), and I have a friend who took the course and started work through the job placement assistance they gave. My start up costs included the course ($750 when purchased in 1999), which took me approximately 4 months to complete. I already had the computer and word processing programs, but had to purchase medical spellchecker @$100, and a medical expander program which allows you to type much faster for $150 and then a good medical dictionary ($80). It is a great job that is flexible and pays well and is interesting. I was a Human Resource Director in my "other life" before having a 1-1/2 pound premature baby, but learned the medical transcription fast and have always been a fast typist (i.e. 80 words per minute). I am sure there are bad schools out there, but my boss said the course I took did give me a good basis in the field.
