These systems are of such a scale that the materials/power/real estate costs dwarf the engineering people costs. The tradeoff, it depends on your business and

These systems are of such a scale that the materials/power/real estate costs dwarf the engineering people costs. The tradeoff, it depends on your business and your team, your risk tolerance, time scales. But a rule of thumb might be if you don't have more than 10PB or so, you probably shouldn't bother.