Commissioning art can get pretty expensive. Most of the low price quotes you might see on someone's site or patron are usually just for completed line-art of a single character. Add in multiple characters and coloring, maybe even a background, and the price can jump pretty high, which isn't even getting into if the game has any sort of variable systems like letting the player changes clothes and/or hairstyles.
As for the art shown, I don't think it's bad. It could definitely be cleaner, neater, and more detailed (right now they look like rough sketches, some even looking unfinished the like the picture of Ava on the couch). Given that the word 'cleaner' comes up a lot in the poll I'm guessing either Westane already realized that or his patrons have brought it up more than once.