“I find it very hard to believe the rest of the world has cheap, plentiful, fast and accurate test kits.”
South Korea has drive thru testing stations.
And several US firms have encouraged the CDC to adopt their tests at less the $100 per.
CDC admits their field test is faulty.
Some articles say the testing sites are in parking lots. Others say they have set up the "pods" shown below (which is obviously a parking lot).
Broad testing of everybody is a lot different than testing of those with some symptoms.