My father is in his mid-70s and after a short stint in retirement went back to work about 5 years ago. He claims it's because of the money, but there's not a lo

My father is in his mid-70s and after a short stint in retirement went back to work about 5 years ago. He claims it's because of the money, but there's not a lot preventing my parents from selling their home and moving to a cheaper part of the country and living out their retirement years. On the plus side, he was remarkably sharp and agile for a 70 year old. But his legs are starting to fail and that's made him age very quickly. Now I can see it being about money (and health care), he's going to need knee replacement surgery and months of rehab. Something my parents will struggle to afford. He's lived a fascinating life, and is full of stories, but to me he's also a warning about the need to cultivate non-work interests and stash away enough money to enjoy a long retirement enjoying those interests.