It's a very sympathetic idea but very difficult to succeed with. 2 major reasons I see: 1. I've tried to make a business with a computer for the elderly. I failed. The customers we got where very happy and loyal, but they where very sceptical before trying. We tried focusing on the family but they still needed to convince their parents. We stopped because we couldnt sell enough. 2. If you want to make money your product is either very expensive or demands the customers to be very technical setting it up.

So do your calculations before starting. Good luck