A table such as a Scheu Premier, Teres, or Acoustic Signature Final Tool is essentially a motor, bearing, platter, and plinth. A quality bearing, correctly maintained, should last a lifetime I would suspect. The only item that might be an issue is the motor. With a belt drive design utilizing an independently mounted motor one should be able to find a replacement motor easily if the original craps out and you cannot get it repaired.
Or, buy two or three used Thorens TD160 Supers and just bring out another one when the first one craps out!
Or, buy two or three used Thorens TD160 Supers and just bring out another one when the first one craps out!