Of these, (1), (5), (6), (7), and (8) have the form “X is important, figure out how to get countries to have X in an emergency”. This is good, but I think for each of these you should also strongly consider figuring out get your own household to have X in an emergency. Since you likely care about your own welfare several times more than that of strangers, these are typically worth doing even at current prices (and each person who sees to their own household makes the world marginally more prepared):
(1) PPE stockpile: You Should Get a Reusable Mask. You have the advantage of not needing to organize a distribution system.
(5) Cleanroom bedrooms: you have the advantage of being able to use non-improvised materials, like air purifiers and far-UVC.
Of these, (1), (5), (6), (7), and (8) have the form “X is important, figure out how to get countries to have X in an emergency”. This is good, but I think for each of these you should also strongly consider figuring out get your own household to have X in an emergency. Since you likely care about your own welfare several times more than that of strangers, these are typically worth doing even at current prices (and each person who sees to their own household makes the world marginally more prepared):
(1) PPE stockpile: You Should Get a Reusable Mask. You have the advantage of not needing to organize a distribution system.
(5) Cleanroom bedrooms: you have the advantage of being able to use non-improvised materials, like air purifiers and far-UVC.
(6) DIY Respirators: you don’t need these if you Get a Reusable Mask.
(7) Particle monitoring: you can get one for ~$70
(8) Food stockpiles: Store Food
Also, if anyone in your household seems likely to create mirror life, probably good to address that.