In all honesty if this thing popped up in the middle of winter in Auckland with an R0 of 2-4 I'd expect to see 100-200 cases at least from the first few generations in the community before the 1st person even went to ED.
The work-thru-it culture it just too big in the west, Some middle-management lifestyle block owner get's something from his pig they would infect quite a few brushing it off as just a cold, If we're lucky patient zero would get hit hard and went to ED quickly and we'd see the authorities maybe become aware of it, I certainly doubt we'd lockdown Auckland as fast as China did tho
Yes, if your example occurred, its not much but those cases and the myriad of contact those cases had in the previous two weeks would overwhelm the health system. As it has overwhelmed China's. While Im acutely aware of China frailties, as are the people themselves as they have progressed from reforms in the 70's to massive growth, to trying to stomp out corruption, my beef is that these outbreaks can happen anywhere and they have. Australia, Middle East, Mexico, USA, etc. Its a global issue. Easy travel, big cities, packed subways, and no Im not talking the Eat Fresh variety! :-)