Good advice above. You don't need a dime to hire one of these law firms. They get paid out of your settlement, if the case goes on long enough for them to owe you back payments (back to the date marking the onset of your disability.) If they approve you quickly and there are no back payments owed to you, then the lawyer gets nothing. And the top disability law firms are okay with that.

You might owe some minor fees, but the top firms will agree to charge you nothing, if they can't get you approved. Most of the work isn't even done by the atorneys, but by clerks. They know what they're doing. It's mainly handling paperwork.