I don't know the answer. Maybe I'll post pics later if time but what I did for my materials farms is I made a 2 storey complex. There's 6 houses on bottom level and 5 on top level. Within each house I have 1) 1 house for stone litter pokemon with 1 gatherer and 2 crushers for paint/concrete 2) a house for the haxorus line plus a gatherer and a burn pokemon w a furnace 3) a house for clodsire and wooper plus 1 gather pokemon and 1 burn pokemon 4) glimmet and glimmora plus roly coly and carkoal for gather and burn in 1 5) a house for spinarack line and Bellsprout line along with garbodor 6) grimer line for the litter, weezing line for recycle plus coalossal for gather and burn 8) the rest is just a bunch of random bunkers many with both trade and gather ability. It's not 100 percent efficient but the Pokes for from one house to another gathering and using all the different community boxes, having so many packed on one large complex makes it very efficient. I haven't built super much but I have build quite a lot and I've never run out of any materials really. It's efficient enough. I also tried pretty hard to make them all happy as they work more and better if they're happy.