Pet rats are the best. Smart, small and easy to train.
Even if you could afford one ferrets stink(yes even with those scent glands removed) and no matter how hard you try the only use a litter box about half the time. And they have a ton of health problems(impaction because they eat everything they arent supposed to) and they have hormone problems and cancer.I had three of them and friend that had half a dozen(her house covered in poo) and half developed some sort of health problem as they aged. I fed mine ferret specific food and made my own in a blender(fresh chicken, eggs, fancy oils, etc). So diet doesnt mean healthy ferrets. One died of cancer, one eventually went hairless and cost a bundle for hormone shots and still died and the other got out of the house after chewing through the dryer vent hose.