Hey, thank you for playing and sharing with your feedback!
The economy does need some balancing, I'll definitely work on that. Make sure you don't have enabled afterburner to not waste more fuel, I'll make a proper indication of that for the next update.
You can put trash into a trash bin, get a trash bags this way, sell them and earn a lot of money. Or just sell space suits or any other useless items. Apparently, 20 trash bags is enough to buy max hull upgrades for your ship 😅