Advice for Hyperparathyroid Disease?

Four years ago my dog Jackson and I began a battle with cancer and won. Now he's been diagnosed with Hyperparathryroid Disease - this is the primary version, so it is not related to nutrition. For some reason his parathyroid just shifted into overdrive. The vet has proposed a surgery to remove the parathyroid, however the cost is not feasible for me. I've helped a lot of other sick dogs through nutrition, but from what the vet says and what I've researched, there isn't anything nutritionally that I could do to make a difference. Has anybody else had experience with Hyperparathyroid disease, or know other vets who can give me some ideas on what we can do to make Jackson comfortable? I would be grateful for any assistance.