I agree with westcoastlad. You may not feel so guilty after living with your parents for a couple of years. You have your whole life ahead of you. And, if you look at it from a bigger perspective, by working in your field you are helping a whole lot of people in this world and supporting your parents. You are not selfish. 

And, there is always a possibility that you may find something in Nepal also. Good luck👍. Keep us updated if you decide to go.