The video game or the the book?
Try not to ask for AR questions here but the answer is because he doesn't want the furies and other demons to know where he is
When people spend their money on fast food they are purchasing food that is unhealty normally. Homemade food or things you make at home, soups, casseroles and salads, baked chicken, will last for a week or two or longer if frozen for a future date. The fast food is expensive, not refillable, and after you eat it, many times you are still hungry. You have made no investment in putting food in the house for future meals for your family. Therefore, more money will be spent to make meals or to purchase moore fast food.