They claim to be able to scale up to 4/day with the current factories. Obviously a bold handwavy claim , but people said that 1/Day.

I have to imagine 350 engines/yr is more than enough for now, even if the FAA has permitted up to 20 launches per year.

Like I said, the whole scale is staggering.

Yes, and not to diminish it in any way, but keep in mind that they need 33 of them per.

39 if you count starship itself.