Are work-from-home transcription jobs legit?

I’m a college student and my husband and I are buying our first home. I normally work part time at a bank (on call) during the school year and breaks, but this semester’s schedule leaves no time for that. I need something I can do for extra money, but I don’t want to get a nights/weekends job at some restaurant just to quit in three months.

I type over 70 wpm and I’m looking for opportunities I can do from home for extra money. I know those mystery shopper and survey opportunities are pretty much all BS, but what about transcriptionist positions? Perhaps medical (I completed a few semesters of nursing school and I worked at a medical office for over a year) or legal (I’m currently working toward a career in criminal justice and I have some internship experience and knowledge of basic law) transcription opportunities. I found a ton of sites that offer these positions, but I don’t want to go for it if it’s a crapshoot.

Anyone have any experience with these sites/opportunities? Or even other ideas as to what I can do for some extra cash without putting in an application at McDonalds.