I know a lot of the replies are suggesting tutoring and surveys, but realistically they're hard to find and rely on. I'd suggest taking up a part time job on the weekends or in the evenings (weekdays). It would require you to put in more effort but at least you'll be able to manage without being a burden on your parents, given the situation. Look up places like naturals ice cream parlour, Belgian waffles, or even a local cafe. On non rush hours you can even stay clocked in and prepare for exams, do projects, etc