Nobody mentioned the smell? Holy shit, that sounds like the setup to an awful prank.
The smell is an intense sensory experience. We had ferrets for a few years, and at no point did I ever go nose-blind to them. They are the stinkiest things anyone otherwise sane has ever willingly let into their home. Cleaning their litter boxes practically requires a respirator. And that’s after their musk glands have been removed (which, at the time, was standard practice; you couldn’t hardly get ferrets from anywhere with their musk glands intact).
They’re fuckin’ adorable, and playful, and fun, but man, the smell. All the other problems with them being only-just-barely-domesticated wild animals aside, the smell is probably the most important thing to know about them.