I once asked the barbers at ramstein air base what they used ages ago and they claimed they had to provide all their own equipment they just rented the space. Also claimed the equipment even commercial stuff ends up breaking fast as in you’re lucky to get 6 to 12 months out of an clipper before it burns out. That said for personal use I’m sure there equipment would last you 20 years. They use their clippers 8 plus hours a day.