I thought that this sounds too crazy to be able to stand on its own. A bang for buck in this situation is a gamble. But let me tell you something. If a particular batch of equipment is from a batch made by exquisite workers. This may last for as long as you can maintain it. There are newer batch of equipment with inferior parts that render warranties or guarantees useless. In the accounting and auditing world this is crazy but on the account that older batches of equipment are long lasting is something that we should also consider when buying used or second hand equipment.
this territory is moderated
Yeah you generally don't know how durable or good a model will be until it's ran for a year. How long the lifetime of the equipment is completely unknown. Estimating failure rates is incredibly difficult because it depends largely on environment, but also quality.
A good portion of the world doesn't have the repair infrastructure the US has. The warranty is pretty much useless in most countries, which requires sending units back to China/US to get repaired which makes it really difficult unless you are operating at scale and can do repairs yourself.
Mining is a major headache
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