Kudos to you for trying to help others in your family. Its very generous to give so much time to this experiment.
I tried it two years ago. Had a close family member, a school teacher, who was stretching a thin budget. I thought, what with summers off and holiday breaks, there would be lots of time to learn and work at getting a successful business going.
Result: absolute dis-interest. Never got even to the first step.
I have kept quiet since then. I wish you well and hope you have more success than I did.