The cost of Nexavar is aproximately 4,000 to 5000 USD per month. My brother took Nexavar for 1 month with no improvement. He had advanced primary liver cancer, diagnosed in July. The tumor was 11cm on the right lobe, and few smaller ones in the left lobe. The Nexavar side effects that he had was rash on the forehead and extreme tireness. After 1 month, he had to stop Nexavar because bilirubin rose so rapidly (bilirubin is a sign of liver failure).
I'm really sorry to hear about your mom. I lost my brother just 3 weeks ago, exactly 2 months after he was diagnosed. The survivor rate for primary liver is extremely low. You may want to consider alternative treatment.
Take Care,