Perfect extremophiles. 30°C temp is low for them and pH of 9-10 with a hardness off the charts. Hard to come by, as few stores can keep them and they tend to not ship well.
I have only once seen them in the flesh at a zoo exhibit.
Super neat fish. Males are spectacular. Shipping isn't really anything to be worried about in my experience. They also don't need Lake Natron conditions to thrive in captivity. If your state side, they are around. Freshwaterfishfan has them on Aquabid occasionally
Average likely not, as I got the conditions Berlin Zoo Aquarium keeps them in: Their pH is about 9 and temp 30°C.
Those readings sound like a compromise to me. I guess with enough acclimation temps a bit below 30°C might be possible but I doubt it's possible to lower the pH much.
So a species tank would be necessary in any case, though only because of the conditions.