Thats cool, looks like most of it, including the base (with some concessions), could be done on a laser tube cutter? Would cost a fraction of getting all the stuff machined.
Find some 3-4mm thick stainless pipe the dia of the largest ring, cut out a slightly orange segment shaped profile for the bottom one (to give you the tilt), then each ring above, make it a C shape with progressively bigger gaps in the C <-- , bend those closed, weld them up and hide the joins behind the plaque on the front. Rest of it is all fairly basic tube cutting and wouldnt cost much, biggest challenge will be finding stock tubes.
You could put the chamfers on manually, but sounds like a ballache to me, i doubt it would detract from the overall look much if you left them off.