To earn SSDI you must have worked long enough and earned enough money to qualify if you haven't worked long enough you can try for SSI which is not much at all but currently depending on the state you live in will make you eligible for free health care. No way are you going to be getting 2000 a month more likely half or less of that. Have you looked into vocational rehabilitation? They help disabled people find jobs that they can keep.

My father worked his entire life and my mother gets 1200 based on his life long upper middle class income.