I've been considering buying a used/refurbished mac pro (mid2012) to run as a slave. My only worry is the life of computers. This is nearly 8 years old now, and even though the price is decent, Id be worried it'd die on me in a year or two. Any thoughts or experience with this? I've always used PC's, but buying a used older 12 core is much cheaper than building a new 12 core pc.