I agree. Based on your description of your brother and his life, I fear you are correct: he may have no basis from which he can empathize with you. He's simply not able to be a partner in supportive dialogue with you when it comes to finances, employment, etc.

Here's hoping that, once school starts, the 14-year-old will perk up and find her fears unfounded. Wishing you calm and growing strength, Tangodream.