Taking out 30 goblins doesn't get four people enough for a meal and a bed? That's messed up. I feel like you'd end up with Marcus Crassus 'firefighter' style adventurers at those rates. "Oh your shop's being raided by goblins? Damn shame. But you know; sword oil doesn't come free."
@Kanol: and lets not forget about all the cores from the previous dungeon. If completing 1 and half dungeon in 1 day doesnt cover your minimum living expenses, then newbie adventurers coud die from starvation before ranking up to a rank they can make a living lol