QT is indeed a rough subject. My lfs said he's had better success just buying from a reputable source, and being very picky about what he chooses, then skips qt altogether. He said he's had more fish die in qt than anything else.
In my circumstance, wife would flip if I introduced another tank, regardless of the reason. She likes the tanks, but I have 3 running now, and a 4th would send her over a cliff lol.