The fallacy of "A 32-core server is fast, and I can rent servers for 4 cents an hour, so I can rent a 32-core server for 4 cents" is unfortunaltely more common

The fallacy of "A 32-core server is fast, and I can rent servers for 4 cents an hour, so I can rent a 32-core server for 4 cents" is unfortunaltely more common than I'd wish. If that simple error is in this analysis (and affects the cost analysis by at least 2^6), what other errors are in the math that I'm not as qualified to catch?