I know exactly how you feel. Exactly. Our female Akita presented with a throat lump and was diagnosed with lymphoma at 6 years of age. I had put my heart and soul into that dog and we were #1 Akita in the competition obedience breed rankings two years in a row. I had to hide from her for almost a week so that she wouldn't see me cry because I didn't want to upset her.
We went the chemo route. If you have the money (and that is an issue, of course) I would not hesitate to do it. It's not like people chemo, it doesn't take them to the edge of life and back again. It's actually pretty benign. We went through some urinary tract side effects and had to change one of the med's in the cocktail, and there were a few skipped weeks because of low blood counts, and there was one med that put her off her chow for a couple of days afterward, but the 6 months of chemo, going to the vet once a week, wasn't that bad. Then she was in a wonderful remission for 6 months after that. Then the cancer came back and we went for another round of chemo. The second time it was almost like she wasn't even on it because we had already adjusted the med's the first time around and, more importantly, she wasn't anywhere near as sick with cancer so that wasn't as much of a drain on her system.
She was the miracle dog. She beat that cancer 100% in two rounds of chemo. But in a monumental example of the unfairness of the universe, we lost her anyway from a massive stroke when she was 8. We had a necropsy done and she was cancer free. She was a special, special dog. The vet said that when they would come to start the IV every week for her chemo that she would hold out her paw for them without being asked. There were a lot of tears there, too. I still miss her terribly.
I now have two new wonderful Akitas. I would not get another dog until after the first one passes.
If you want to talk about chemo or anything just send me an IM.