There are no benefits paid directly by the Social Security Administration to care providers of the disabled. However, your county or state may have a program that pays care providers a salary for a set amount of hours of work a month. In California the program is called In Home Supportive Services and it is administered through the county welfare office. Your local office could be called Social Services, Human Assistance, Public Assistance, etc. Eligibility for being paid as a care provider may be based on the income level of the disabled person. The point is to provide assistance in their own home to keep a disabled or elderly person out of a nursing home for as long as possible.

Medicare would be of assistance if he was under hospice care. You could look into Medicaid assistance, but I doubt there would be any payment under that.

Benefits for children end when the child turns 18 unless they are still in high school full time. If they are still in high school, benefits end with high school graduation or age 19, whichever comes first. Decades ago there were benefits paid for college students, but that has been eliminated. Adult children who are unmarried and found disabled before age 22 can sometimes get benefits on a parent's record.