How do I deal with the guilt of leaving parents when moving to other country ?

I am from Bangladesh. My father was 60 and my mother 38 when I was born. I have 2 elder sisters. My father is a very hard worker and still works at the age of 80 to keep the family going. My mother is a housewife. I am about to complete my undergraduate degree next year. I now have the opportunity to move to another country for my studies and eventually settle down. I have always hated living in Bangladesh and it has always been my aim to move out. My thoughts, beliefs are too different from the norm. The government is corrupt and everything is a mess. My parents know how strongly I want to move out and are supporting of me. They are financially well off and I am going to take a loan so I am not a financial burden. They have enough money to live comfortably the rest of their life. My Dad is very old and I am scared he will die anytime. I feel a lot of guilt in leaving him here and moving out of house. I am scared I might have very less time with him. At the same time, I really want to advance my career. I want to get out, be independent and start my own life in a place I like. I know there are going to be struggles but I am all ready for it. I had decided to move even before I started my undergraduate. Since Undergraduate outside my country is too expensive, I couldn't. Now I have the perfect opportunity to make a life for myself. My elder sister is there to physically take care of my parents. But I don't want to miss their last days. At the same time, I know I will have many regrets if I don't move now.