No idea how to help

My sister has just been diagnosed with Colorectal cancer and she'll need help around the house as well as emotional support. She is a carer for her husband as well as her son both have complex physical and mental needs. She will have to give up work as the only bread winner. I live on the other side of the country and care for our mother. So I was just wondering if anyone had any knowledge of help that might be available to them as she cares for her family so will need help for them after she's had surgery and ongoing treatment.