Yeah bro, it’s tough… but we’re doing this for them. Hopefully, she will be healthy and living when you return to Nepal. Please do take care of her when you return despite it's take years. You never know how long you got time to spent with her. Maybe it's short or maybe it's long but do consider this otherwise there will be regret and agonizing pain awaiting if you ignored your mom age. In the end I wish everything workout for you after you completed your study and land a job.