A full rack with 16 amps usable power and some bandwidth is $400/month in Kansas City, MO. That is enough to power 5x A100s 24x7, so 10k plus $80 per month each, amortized, of course many more A100s would drop the price.
Once installed in the rack ($250 1 time cost) you shouldn't need to touch it. So 10k plus $1250 per A100, per year including power. You can put 2 or 3 A100s per cheapo Celeron based CPU with motherboards.
Of course if doing very bursty work then it may well make sense to rent...
You also left out the data tech costs- probably at least $50K/individual-year in KC (although I guess I'd just work for free ribs).
If you're putting A100s into celeron motherboards... I don't know what to say. You're not saving money by putting a ferrari engine in a prius.
You hire people who are employed by the DC, by the hour for DC work. How much work is there to do once it is screwed into the rack?
The problem though is that getting 2-3MW of power in the US is increasingly difficult and you're going to pay a lot more for it since the cheap stuff is already taken.
Even more distressing is that if you're going to build new data center space, you can't get the rest of the stuff in the supply chain... backup gennies, transformers, cooling towers, etc...
Answer these questions, and the equation shifts a bunch!