Petsmart, walmart, petco etc. have fairly cheap hamster cages. What I would do is buy one, a water bottle and food bowl and bring it in as a "I had this old stuff laying around and don't need it any more" kind of a thing. ANY cage would be better then what this hamster is living in right now. You can buy like $5 carrying cages at walmart that would make it so the hamster had more room. If you have the extra cash and the cage is big enough, I would also buy the hamster a wheel to run on, but the most important thing is a cage and water bottle.

Ashley