@tsnuggs - I saw the JAF Inox roasters when I was in Brazil in July. Based on their design I would have said loading and loading nib would be difficult and I remember asking this question (though I could be misremembering) to the founder Adriano Pedroso. The pricing I have for a 10kg roaster is a part of a package that includes a 10kg/hr winnower and a 50kg universal refiner/conche for $50k. I am guessing it's in the neighborhood of $10-15k (though I am asking). It is electric only.
@Xrawrxx - You do want to check that you can get into and maintain the temperature range for cocoa as it's much lower than for coffee and ensure that the modification includes a variable speed control on the dum. But, otherwise it should work. These roasters are made in China but I have heard good things about them - and certainly they are priced well. I would also make sure that you get the instrumentation package and hook the roaster to a computer so you can record roast profiles.