If your retired on Social Security, how are you suppose to make 20,000 a year? Unless you own a big business, it isn't happening. Even a second job at Wally world as a greeter don't make that much. It would appear that a co-sponser is unfortuantly the only way to go in this case.
Another Question, What if you own a small business, does that count? and for how long do you have to make 20,000 after she is here?