Use tiling textures as much as you can. You can use those tiled textures on many assets. Then if you want to make it to look a little different from others just blend other maps on it either in material editor or use vertex paint. 
Use tiling textures as much as you can. You can use those tiled textures on many assets. Then if you want to make it to look a little different from others just blend other maps on it either in material editor or use vertex paint.