Please note, that the goal is NOT to "have 100 000 M funding at Sol 100", but to "produce 100 000 M funding before Sol 100".

That makes a huge difference - I unlocked the achievment at Sol 98 with 78 000 M funding while there was no way to accumulate another 22 000 M in the last two Sols. I was surprised getting it, because I thought the achievment had been lost already.

To get so much funding it is obvious you need to export huge amount of rare metals. Blue Sun Corporation, which is required for the achievment, makes it easier for you with their Deep Metal Extraction tech. To find some deep metals you need Deep scanning technology to deep scan sectors on the map. That's the reason I chose Astrogeologist as a Commander.

You can find more rules, that will help you to get the achievment, I played with the following set:
Prefab Colony - speeds up your progress in early game with prefab Basic dome and several useful buildings, such as 2 Moisture vaporators, 6 Stirling generators and more.
More applicants - you need a LOT of geologists and this is a way to get some of them.
No disasters - I have failed the achievment before because of long cold waves slowing me down. I'm sure better players than me can omit this rule and get the achievment nevertheless, but this makes life much more comfortable without doubt.

(KINDLY SEE THE COMMENTS, THIS MAP IS DIFFERENT NOW)
I played on 5S131E map. There are more than 4000 units of Rare metal in two deposits at C1 coordinates and I reccomend to build your base near these two. There is no water though, so you have to rely on Moisture vaporators until you get to the nearest water deposit at D4. At coordinates E2 there is the nearest large deep water deposit.


I played without disasters, which means you will probably want to choose your own map if you don't want to turn them off. This guide shows you principles, which you can use on any map with usable Rare metal deposits.

According to my pre-game calculations, if you manage to have 5 Rare metals extractors in Sol 30 fully manned with specialists, you are fine and you can just wait. But you won't have these... :-)

The trick is, you do not need to focus on self-sustainability of your colony. With funding you get by exporting Rare metals you can buy literally everything. I wasn't aware of point 1 of this guide, so I have used the money sparingly and have imported only Electronics and Machine parts, which require too many colonists to produce on your own. But when you know, you can use all the money you earn, you don't need to invest too heavily into research, because you can outsource all the time. You could even import food. You can buy as many rockets as you need and buy prefabs from Earth without hesitation.

Short summary of my game:
I tried to build as many Rare metals extractors as possible, ending with 6 fully manned around Sol 60. A bit later I built a Medium dome specialized at Tourism and connected it with Services dome nearby. I haven't used Corporate offices, because they need too much staff. Food was from Outside Ranches, after researching Deep water extraction tech, even water wasn't problem anymore. Power was from Solars supplemented with Stirlings imported from the Earth. (Don't bother with the solars - you can use all your money, so just import Stirlings an be happy.)

This is my colony on Sol 101.

I think this is basically it. You will have much easier time than me, if you don't forget the point 1. of this guide. And maybe you'd want to turn the Mystery off - I thought the Phillosopher's stone would help me, but it was more a nuisance with the Dust devils and hidden squares on the map.

So, good luck, have fun, fellow colonists. :-)