Nothing going right and need a break

I need help/ advice.

First family holiday after a rough couple of years!

So we have finally booked our first ever family holiday which we are all very excited about and look forward to going on. We have had a very rough couple of years nothing has seamed to go right for us.
My father committed suicide 2 years ago which was very hard on us all and still dealing with it. Then my father in law passed away a year later and I was the one by his side when he took his last breath which is something that you will never forget and will live with forever, I would never want to change that I was with him but was very hard.
We have had to pay for my father in laws funeral which was no problem at all but has left us very short financially.
We decided we all need a break and book a cruise and paid off over time. The only problem I have now is trying to pay for flights to and from Sydney for our holiday.
Has anyone got and advice on how I can do this? So we can still go on our holiday and have a time.