The only modification I'd make is to amortize the investments over 5-6 years instead of 20 because most of the cost is GPUs not the buildings. This increases the required revenue by 4x.

Well, if you buy a bunch of GPUs and don't have buildings to put them in (a very real situation right now), then you're just .... holding hardware and not making a return off it and *the building (and related power infrastructure)* becomes much more important than how many GPUs you have.

Compute hardware is ~50% of the cost of a datacenter. If we can assume a 5 year lifespan for the GPUs, that puts the ammortization timeframe closer to ~10 years.

Another weird trick (that seems to be in play) - don't unpack them yet, so they are not yet depreciating assets! Listen to https://open.spotify.com/episode/1QjM5Ud5kjHzMIY5G7hjhW?si=o...

There's one weird trick to preventing your GPUs from losing value. Buy all the ram.