I still think it is exceptional you are doing so much in order to learn Torah in Eretz Yisroel.
Perhaps you can work in the Yeshiva as a kitchen boy or something in that category. A friend of mine is currently employed as a waiter for Shabbos meals in a Yeshiva in New York City. While he cannot go home for the weekends as much as the other students, he does pay a lower amount of tuition.