Not the parent, but, I, too, have done the cost analysis, at much smaller scale.
And, yes, all-inclusive, AWS is 1.5x-10x more expensive than commodity hardware, depending on how poorly optimized AWS's hardware choices were for the particular workload and the commercial datacenter market at the time.
> What about the salary of the person
In general, I've found the need for the quantity of "person", bizarrely, exaggerated.
> The cost of spare parts?
Included, and it's low. Is this another aspect that's exaggerated?
> The cost of downtime when hardware breaks?
This is identical to the cost of downtime when AWS's hardware breaks.
