This comments reads like the classic "dropbox is trivial, it's just rsync" except it's more like "dropbox is trivial, it's just rsync on kubernetes with a reactJS frontend and a backend written in Haskell"
You won't be doing all this [PCR] from scratch at home McGyver-style (okay, maaaaaybe with a biochemical education) - but if you've got access to a biochemical lab that's doing RT-PCR anyway, has all the machines and all necessary chemicals (expect the COVID-specific markers) it's much more straightforward.
Running these kits out of your garage is like running a tweaked, existing file system for a home network. Not completely trivial, but it's not Dropbox, guys.
And you don't think this test needs to scale, with the millions of people needing to be tested?
[0] http://www.csun.edu/science/biology/AP_biology/text%20files/...