Quick, before summer is over, can you pick a week and arrange it so that you give yourself one day off from everything but writing and your immediate family? Cook meals ahead of time, assign the kids to fix an easy breakfast, have your spouse take the kids to the beach alone?
Not everyone grows up poor, but can you remember a moment when you felt deprived? Write for ten minutes on what you were deprived of and how that felt. How did it shape you? Is there a place in your story where your protagonist feels deprived?