I'm like Undormant -- try and keep all my stupid OTT projects in ONE place.
Old World (what I had):
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I had 6 large bases and another 6 smaller ones (mostly spawners), and a long railroad and 30+ rabbit depots for animal deliveries, and 2 incomplete towns. To be fair, /warp wasteland was given to me for free by a player who gave up on it; I did very little with that town. I was trying to put depots every 5000 blocks in a grid pattern -- got half the world covered.
ONE New World Base (ugly industrial site):
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This time, I want ONE main industrial base in deep ocean that I expand over time with a bit of planning to fit things in nicely into 4 separate areas of 160x160 to afk in: animal/egg/crop farm, iron farm, gold farm and villager trading.
If I excavate a large main base area to bedrock, I should find 2-3 spawners in a 320 x 320 area. Drive corridors to light up all caves -- much easier to do in deep ocean. I found 4 spawners in that size of area in the old world (the abandoned mine helped a lot).
Separate Town to Live In:
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Then rebuild a separate town with 2 other players on an ocean island or peninsula -- we had the town almost ready to open in the old world. There were 3 nice castles for the founders, some homes for sale and some nice building lots
Nether Railroad Grid:
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Animal delivery depots are a problem. I want to expand to delivering villagers which means boats or railroads because I can't fly villagers on leads. The smaller new world means that I can have animal depots with villager breeding units every 3000 blocks and still only need 9 to be within 3000 of any point.
Anyone interested in helping me build a dual track railroad network in the Nether to connect the 9 depots?
I aim to make a grid with intersections every 375 blocks (or 3000 in the overworld). It will be 3 high by 4 wide with a 4 wide cobble base and 2 x 3 high cobble walls, all tight against the roof -- if Ghasts can't see you through glass, then I prefer glass walls. Create Ghast proof entrances every 38 blocks (powered rail locations) to allow players to enter and leave.
Calculate exact locations in the overworld for the portal to appear, build a platform high up in the sky, then make the portal from the Nether side to hit the platform in the world.
This works out to 3 parallel rail lines that are 1125 blocks long crossing another 3 perpendicular lines -- 6,750 blocks of rail.
I will wait until /fly is available though -- spend the first month getting my main base roughed in with at least 1 spawner for XP.