Retirement business for my mother

My mom is an amazing single mom of 5 who has been working hard since her teens to support her kids. Her only wish is to have a comfortable retirement without worry about what food to eat the next day. She is not the type who depends on other people and I know that she will be working until her deathbed for her kids. As her daughter, I want her wish to be granted that is why I am thinking of a business she can manage even at her age that would allow her a little financial peace of mind.