Do you think Julie and Tim are obligated to continue assisting their daughter and grandchild?

Do you think Julie and Tim are obligated to continue assisting their daughter and grandchild?
What if it meant they would have to live in an apartment in a run-down or crime ridden area?
Do you know anyone who lives or had moved back in with their parents?
What was the quality of the relationship and some of the challenges they faced?
Do you know anyone who is using their parents (grandparents) to help raise their children? What do you think about it?