[BobS]

"By the way, these ventilators cost around $30,000. So, it is unlikely the Average Joe can get one to stash in his basement."

I'm not an average Joe Blow. I know where I can "borrow" a bottle of pure anhydrous oxygen at 2000 PSI. I have the regulator and the ball flow indicator needed. Pure oxygen is like some sort of drug. You get wide awake, think and act quickly. And all the bad things in your body get oxidized and dumped when you go to the bathroom. Fighter pilots breathe it. That's why they are always bright-eyed and bushy tailed:)

[Gritty]

I know where I can "borrow" a bottle of pure anhydrous oxygen at 2000 PSI. I have the regulator and the ball flow indicator needed.

Great!

You had best set it for an ambient altitude above 34,000 ft to get some serious pressure breathing going in there...