Listen to your comments and possible future steps ideas.
Sharing my ideas hoping someone finds useful things here
This is 120+ hours base which I will post in parts and in general view. You will see some info about all significant parts of the factory in the posts below.
Main strategy while played this map:

Right! This relates to all types of the resources including fuel, and main thing - pollution.
So, almost no pollution efficient designs, economy modules, steam engines in the forest and stuff like that.
Second rule - Energy challenge. I have experience with fully solar base and that’s just too boring )))) So I decided to do splitting: cause biters and their attacks are UNlimited - I decided to power my defence perimeter with solar as UNlimited energy source. And all rest - mines, base, production, everything - have to be steam powered from .
Third rule is - there is no perfect solution. Meaning if I can create simplest production with speed X spending on constructing about 5 min - good. If I can spend 10 minutes more and get X*2 items per minute more - that’s better. But spend an hour of experimenting with performance to get 5% raise in production - no. So you probably will be able to make my creations better. However I try to do them simple enough to understand and as repeatable as possible.
I posted full screenshot of the valuable part of the map, feel free to view. And, if you need any details about why I did this or that - see separate explanation about this particular part.
So, here we go
Whole base - HIRES WARNING
Preview

Link1 (reduced size)
Link2 (size 1:2) biggest.
Minimap


This is most zoomed out view. You can see that I've choosen quite challenging map options. Resources are high but not very high and they are rare. I have weak oil mining. It depletes quite fast. A lot of water and forests.
This makes the map interesting and water gives also defense and steam opportunities.
I have to have a developed trains network and it’s one of the things a like the most. Trains are my fetish, in real life and in game. I spend time with passion when creating new routes, making crossroads, testing them riding trains by myself.
When all system is up and running I can watch it for hours ))
The only issue with territory is I’m afraid that if map will be too big and also if map will contain a lot of monsters I will lose fps and that will end this map.
Quite slow PC so… That’s why I have not much discovered territory outside the base. And that’s why I don’t have a single radar - to avoid uncontrolled enlarging of map.
So, talking of performance and pollution, below are diagrams showing production rates - they are probably not maximum, just while the base is running and doing a lot of stuff at the same time in a usual way. This is not something I’m proud of, numbers are not that big but this is more for you to understand the scale of the base and that’s it.

All steams I have now will not cover the need if base will will run on 100%.
This is of course because of modules and (less important) roboports as you can see.
And this would be total about maximum consumption of the base.

Production rates are not maximal but typical.

Pollution
And talking about payback for all speed modules you will see and all steams I have and all thousands of robots I use - here is pollution diagram.

Looking on it you can imagine I’m getting attacked constantly. Sometimes it is so. And you know… I like it! It makes me feel the base is alive. And the game is alive )) somebody is near me. I can get my battle armor, go outside the perimeter and say hi to them with a shotgun. Or I can leave them for my turrets. Democracy in its best reincarnation!
Also, as you can see from my battle section (when I will post it) all these defenses almost took no resources, runs on free energy and have fully automatic repair system. So I can just totally ignore even constant major attacks all the time. Until I want to move the perimeter, of course.
In the following posts I will try to highlight some key point of the factory and will answer questions if any.