Update: May 13: Trump blinked. He tweeted, "Too many jobs in China lost,. Commerce Department has been instructed to get it done!" Previous: The maximum cost to keep the company going for two years would be about $10B if they didn't sell a single product. With some fast engineering work and smart management, the survival would cost less than $5B.
The money will be found and the company almost certainly saved. 80% to 90% of ZTE's requirements can be immediately sourced in Asia. DC now needs to cut the U.S. losses. Apple stock lost $60B when Trump declared war. China's response will include developing national alternatives for any product that is dependent on a U.S. supplier. They also will go for the international market.