Kodachrome processing is not a problem of machinery at all. Kodachrome could be processed even in small hand-agitated spiral tanks and removed from spirals two times for the reverse exposures. A small and simple machine (consisting of one stepper motor, motor driver, two leds, maybe some filters and some mechanics) - about the same size as normal processing tank - could do the exposures. The real problem lies in chemistry availability and cost and process control (processing quality). I mean, if you can't get perfectly the same results as you always with Kodachrome, then there's not so much point to shoot it at all as there are much easier E6 films available; Kodachrome shooters want a specific look.