treborjim:  No unions

Well, that and very little "Red" tape along with paying construction workers triple wages tied in with 24/7 work schedule using prefabricated building components can do marvels in terms of speed building.  Another factor is that these facilities are not near the same in complexity or equipment as hospitals being built in China planned out and constructed in a more conventional time schedule.  The one built in Beijing during the 2002 and 2003 SARS epidemic was pretty much abandoned after SARS and is now being remodeled and repurposed for the current Corona virus, 2019-nCoV situation.