A while back I shared a place with friends, a couple of whom had ferrets. We created these enormously long tubes that went out one window and came back into another and snaked all over the big backyard we had. The ferrets loved it.
Also, only get ferrets if you have time enough to bathe them EVERY. SINGLE. DAY. They do get a bit smelly.
I stand corrected. Wish I’d know this 25 years ago. Cheers!