Welcome to OCF! Im very glad you have found this forum to help you with info and support so you can help your x-wife. Seems like you are already absorbing some info. Yes, she will need lots of help. OC treatments can be brutal for many patients.
I suggest if possible, going to a major comprehensive cancer center (CCC) and seeking the best medical care you can. Below is a list of CCC's. They are the countries top hospitals to treat cancer and you should get the most up to date treatment available. The CCC facilities all use a team based approach where the specialists get together so everyone is on the same page. If you cant get to a CCC, there is also a list of the top US hospitals. Look for a teaching hospital or university hospital. Find the best medical care you can and also get a second opinion.
CCC list US News Best Hospitals List She will want to line up helpers. With living 100 miles away, you will have more than you can handle with trying to help your x. She needs to speak up and begin to talk to friends and relatives in her immediate area. Anyone who offers their assistance, she should tell them that later when she needs a hand she will let them know what they can do to help. Take down their name and number and begin the list. She will have a tough job handling everything by herself, even the dog can become alot to manage when at the end of treatments. Being a caregiver isnt easy. But dont worry, we are here to help you both get thru this.
Best wishes!!!