First, I think it is terrible the wife abandoned him at a time he was so vulnerable and she must answer for this, either now or in her future. You are an Angel for helping your brother. There will be tough times, but just hang in there, you will be blessed for your deeds. If I were you, I would contact the Social Security Administration and explain your problem; and contact his employer because maybe the company some disability payments. Good luck-God Bless.