When do you give up when it's sick?

[Blondie]

I've been all over this board wondering about this den that I got exactly one week and three days ago. It looked PERFECT when I bought it. 30 buds. Healthy. Beautiful!

I brought it home and it had mites and immediately the leaf turned yellow, spotty, and fell off. Then it spread like wildfire up the cane. Now it's onto the next cane. I pulled it out and repotted it, washed it down with 70% rubbing alcohol, and gave it some cinnamon. Nothing is helping. All buds blasted.

Now I found a spot on a healthy phal that was growing a spike. I really don't want this to spread everywhere. I don't know what to do. I live in a small town and didn't have luck finding a good fungicide, but I'm not even sure that is needed or would help. I am THIS close to pitching it in the garbage so it doesn't kill my other orchids. Dead orchid walking. Thoughts?