I worked with a friend on gathering a 'Batch' of Camaro parts requiring plating and we found a Seattle area plater that welcomed Hobby plating and we pooled our parts and sent them out for plating.
Appx COST is Very inexpensive-affordable! Shop around, you might get luck locally
85$ min-per rack and you prep the parts and a RACK was HUGE, they plate AIRPLANE parts around here (Think the BIG "B" flying ALUM TUBE Co.) so you can imagine the Rack was appx 4' x 8' and it was up to you whether you had 2 pcs or 100's what ever would fit on the RACK. Very good turn around and great quality. This one did , Zinc, Cad, Gavl, Nickel, Anodz,,etc...