You have to take care of oxygen, food, electricity, germs, toilets, temperature, creatures, pressures and much more. You should keep an eye on the needs of your workers, who need not only food and water, but also heat, oxygen, in order to survive in the asteroid mine.
There are already first guides online, also you can find first wikis. Whether there will be mods later is not yet certain. But it's certain that you'll always find the best price for your Steam Key!