Earlier quoted context omitted.
Yes, she can move. If she cannot afford to live there, she can move. It sucks, but life sucks and sometimes it means you can't live exactly where or how you want to. My parents worked as "pickers" for the Home Shopping Network near DC, making minimum wage. It became financially untenable, so they moved to southern Virginia to a place with good schools and where you can live and get by on low income salaries.
That your parents once did something in different circumstances does not mean everybody can here and now. Even if we value family connections on a pure cash basis -- which I don't recommend -- moving can be bad for people. E.g., the cost of replacing grandparents with professional childcare can be astronomical. Family also provides an economic buffer against the ups and downs that are especially hard on the poor. Wha…
Many can.
In my city (nowhere near SV), the cost of living is a bit high. I knew a bunch of low skilled workers who worked in restaurants, cleaning dishes, cooking, etc. They were all fairly close. When rents started shooting up a few years ago, they got together and made a plan - and moved to the Midwest, buying houses in the $40-80K range.
One of the mechanics I used to go to: Same story. Ended up moving to Texas where it is cheaper.
Most cases where I've seen that it is not an option fall into two categories:
1. A desire to be near very high quality services (e.g. one person's kids would get almost free health care from a neighboring university's hospital). Essentially, a desire to keep high quality tax discounted services. These people are making a choice - they can move if they wanted to.
2. People in some kind of hole - usually a financial hole. They want to stay pretty badly so they make poor financial choices, ending up in debt, with poor credit, etc. That makes it harder to go, well, anywhere. That's why the smart thing to do is move before you fall into that hole.
As someone who has lived in places, and grown up in places, where essentially we could have been forced out legally (and in one case actually were), I know what it feels like. And the solution for us was very obvious: Know that we do not have a right to stay where we were, and make contingency plans. For me, part of the contingency plan was to try to move some place that was much less likely to kick us out.