Free volunteer programs for 4 months?

I’m currently in Israel finishing up at Yeshiva and have until August till I fly back home. I’d love to do a program where I could volunteer all day, maybe on farms or anything that is needed in exchange for food / room. I’m here with my fiancée who would also be interested in volunteering. Does anyone know any programs like this? I’m planning on doing Sar El, but the max is 3 weeks.

Would appreciate any info on this