I never have much money so don't know where everyone is getting it from. I'm always upgrading my ship which costs arm n a leg, or filling my ammo up. I only use around 4 weapons max.there's barely any missions left on mission boards as done most of them. My ship is maxed out yet only have just over 300k In Bank after like 130hrs
I used the mining laser (in the face) most of the game so had no need for ammo. Ended up with 1.4 million creds and the best ship you can buy in the game. Plus 4 or so houses (never did furnish them though).
Once I am done with Cyberpunk and Resident Evil 4 dlc I will go back and play slowly doing bit and bobs here and there I think.