That IS a lot of hardware, but its mostly initial cost, a hard drive uses about 10W (as said by his comment) so thats 640W on his rig, if he had kept his coins 69250 burst coins are now worth ~650$ so if he had used 8tb hard drives, each costing 180$ (he probably cost it more if he's using 1tb drives) that's about 2000$ in total costs, so he should ROI (based on current ratings, alt coins are on a bullish phase) in 4-5 months at max, and he would have a small electricity bill and tons of hard drives to resell at close value.
Yeah probably it was all about the cost that he incurred due to the HDD. I am not understanding why you getting this all in neg side of picture. He might be Ito something where he want to increase the capacity of random access memory.