You dislike people generally as it is. You should do what I do for a week and just watch the downfall of our modern financial structure, as you grow to a intolerance of all ignorant people.
As for the OP. Alex seems like a nice guy. I wish your friend the best of luck. But at 558 she will be at the mercy of most alternative financing companies. Depending on the year of car she will not be looking at a very good interest rate.
In my opinion (yes i am a car dealer) if her 2006 HHR is paid off then she needs to drive the thing till the wheels literally fall off. In that time she should be able to increase her credit score to make it easier for her to be in charge of her buying experience rather than at the discretion of whatever dealership decides to help her.