[Preacherman]

i personally like space station mining.

let's just say that station costs 20k (a big station) another 3k-4k maintenance that makes 24k + 10k for the ship to build and you are at 34k.

place it around an asteroid that does 260% minerals and you earn roughly 26k per turn, break even after 2 turns and then it is +20k surplus each round.

throw in stealth armor or cloaking and you got a space station that is not so obvious to your enemies. but beware of friends that try to mine the same spot as your cloaked station... that can ruin your income...