Reunite the family-Come home

As most everyone knows, my kids and I have been on Oahu since 2010. Being a single mom is hard enough, but with the bullying and hardships that my daughter faced, Oahu was beginning to feel like maybe it wasn't the best place for us.
This year, I was offered a job in a better school district with the added bonus of health insurance for free for my daughter, but my son is a senior in high school and didn' want to leave.  I needed this new job for my daughter though, and moved to the mainland. Drake didn't mind. In fact, he encouraged me to leave and let him stay with his friend and that family. It's torture being away from him, but he is happy there. This June, he graduates, and my daughter and I promised we would be there for his graduation. I'm finding that I'm having a hard time getting together enough money for the trip back, and for his flight to the mainland after graduation. I'm hoping to have just enough to pay for our trip there and the three of us to come back to the mainland.
Any help would be lovely. Mahalo!