Even your ability to care for yourself is considered. Your daily activities are important, not your living situation, I believe. (If you're caring for an infant full-time, without any help, it might be questionable...With an older child that requires fewer physical demands, I doubt it'll be any issue.) Add in that you're providing care at night, I would assume this isn't physically demanding. At the ages of 50 and 55, the standard is slightly lowered for qualifying for SSDI, due to the "grid rules." If you haven't yet read the "before you apply" sticky, it will help. There are many factors that go into an SSDI decision, severity of disability is key.