I really, really, want to go into a bunch of detail on exactly why this calculation is so incredibly naive. More as a personal thought exercise than for internet fame (since this will be buried under a buried comment).
Maybe I'll find the time...
But, like everyone else is saying, putting things in a datacenter in a resilient way for a high profile, high bandwidth, multi-national app is not the same as buying some ssd, or even running a hetzner instance.