Sisters medical treatment

I'm trying to raise some money for my sisters IVIG treatments she needs every month. She has autoimmune disease and an IgG deficiency. Her body doesn't produce antibodies to fight off infections. The IVIG treatment replaces antibodies the body should be making, but does not help the immune system make more, so repeat treatments are needed every 4 weeks. The treatments are $700 a month so I'm just trying to help her get set up for a year while we figure something out. She's only 26 and a single parent. My nephew just turned 7. We appreciate anything anyone can help with. Thank you so much.