Since you are applying through QB, any woe is me essay is redundant if overdone. AO’s know that you have had some type of struggle, whether it being from a rough area, low income, or maybe a single parent household. As was mentioned above a few sentences should be all you need. For example, my kid was a QB match, from a single parent home and low income. The only sentence in her essay indicating that was about her reading 4 Harry Potter books in3rd grade over spring break, whereas here friends were mostly on beach vacations. The point got across about her love of reading, while being subtle about our financial situation.