Flight And Car To Visit Mom

As most of you know by now, my mom is dying. She is in the end stages​ of liver disease and currently on hospice in her home. I live in Nevada and she is in North Carolina. I am looking to fly out to see her the second week of July. Ticket prices are already sky high and on top of that, I need to rent a car. I am thankful enough to have friends willing to let me stay with them while I'm there, so I don't need to book a hotel. I am asking for any donations to go toward my flight and rental that is going to cost just under $700. Anything will help and I appreciate it very much.