When my girl died at home, when I was ready, I brought her to the vet later that day to be cremated.
Regarding chemo, and you may very well know this, but even in animals, I think it can be curative in the blood cancers, as in humans. For many of these cancers, I'm a huge believer in IP6, though I don't know about hemangio. Since the symptoms of this cancer are so similar to tick diseases, and doxy helps with these cancers, that's one drug that always makes sense to me for this cancer.
I think that diet and a good supplement program can help so much with quality, and sometimes quantity of life in these situations - am hoping for the best for you guys!