Money for sisters marriage

I am an indian guy who is currently studying masters degree in Dublin, Ireland. My sister's marriage is on next November. In India, there are a lot of expenses for a girl's marriage. I am from a poor family. My father is the only earning person in my family. And his job is going to be lost in a few days as his company is going to shut off in a few days due to some financial crisis. I came here to study by taking education loan from bank thinking that by studying well and by finding a job I could repay those. My family has given word to the bridegroom and his family for the marriage and now my family is on a huge crisis for finding out the required money for marriage expenses. When my father losses the job I am the next person who has to support my family and conduct my sister's marriage in the forefront. I am sure I could do that in two or three years, but now I am unable to do that as I am still studying and the marriage date is coming to close. The financial condition of my family is really disturbing me and it is even affecting the studies. My parents told me to do as many part-time jobs as I can when i have no classes and I am doing that. But it would not be sufficient. That's why I decided to post a request like this. So If anyone could give some help, it would be very helpful for me.