The ability she has is so overpowered that either the author doesn't realize the implications of what they created, or the main character is an actual idiot. She recognizes the ability to manifest things like body changing potions, or animal repellent potions, but she still worries about food or money. Some sort of nutrition potion flavored to whatever you want to eat, or god, turns whatever you pour it over into that. Rock becomes delicious medium rare steak with a side of garlic potatoes? Totally possible.
Also, she stole all the furniture from the barons house, but why? For money? You're a freaking alchemist, just turn pebbles into gold coins. If you're not above stealing from people, you might as well not be above counterfeiting gold (if you can even call it counterfeiting since it would actually be real)