first, i'd vote for a real machine that's cheap. you can get a good one for $100 from Walmart. Singer has some low priced ones that sew great. I've a had a few in the past.
I taught sewing to young girls. I worked in a sewing store, and got some pupils that way. call your local high school. a Home Ec. teacher will be able to send you a good sewer for about $10/hr.
When I taught, 3-4 lessons, and they were off on their own. I taught the short cuts too, and the basics. good luck.