need help for study expense of my brother

I am Asim from Bangladesh. my younger brother is studying in class 12. my dream is to make him highly educated. he is very very good student. Got Maximum score in SSC (Class 10 govt. exam). his monthly study expense near 150$. its very to continue his expense for me. my father is aged person. only earning member is me. i earn near 200$ per month. after giving his study expenses rest 50$ is not enough to run a family. i need to support to make my brother well educated. i love my brother. And I really want his to be a great one.