tophias size

genuinely im so confused (and a bit impressed)

how does tophia maintain her size and order so much food with always being short on money and now being homeless and living in a car?? ive always been confused because shes never gotten the slightest bit smaller. im wondering if she just eats most of the food they do have and leaves mamachu with nothing, but still, theyre homeless, id assume they dont have much money for food? where does the money come from?