The production cost of hand-made model is only the original painting. The easiest way is to find a 3d printing service shop. Does China know? There are many such websites in America and Japan, and they also accept overseas orders. Just send the 3D model and put the rest there. If the price in Japan is different, it depends on the size. Some charge according to the size, ranging from 50mm to 300mm, and basically ranging from 1500 yen to 120000 yen. Others are charged according to materials. The algorithm is more complicated. It's best to make a 3D model. If not, ask a friend to see if it helps. If you let the store do it, there will be an extra charge. You can also buy a 3D printer yourself, and the price is around 5,000 yuan.