Do I need a cage for my ferrets if I get some

Yes, get a cage. You can let them run free some of the time, but a totally free range ferret is a good way for him to get hurt or killed. It is physically impossible to completely ferret-proof ur house. The only logical alternative to a cage would be to have a separate bed room used only for the ferret. Go over it floor to ceiling, secure vents, plugs, cupboards. Make sure there is nothing they can dig in, eat, destroy, or any way for them to escape. If there is a way, they will find it. You should get the book Ferrets for Dummies. It has a lot of information & tips. It will help a lot.
But please, get a cage

If I was u I would get a cage, to put them up when ur not home & when u go to sleep. They r like little kids they need to be watched at all times, so they do not get into something that could hurt them. I let my ferrets run all day when I am home & when they want to sleep they generally go to sleep in there cages with out me putting them in there. I do not ever use the cage as a punishment. I would say if u did not want to buy the cage, than please just make sure they do not get in to any thing that could make them sick, because with them having free run u might not be able to realize something is wrong with ur ferret until it is too late.
Good Luck.

My sister has four ferrets, and you absolutely need a cage, until you train them.
They poop everywhere.
They get into your things.
Ferrets hide your stuff.
They hide places themselves and you cant find them.
Plus they make a lot of noise, because they love things like bags, bells, and paper.
But Good LUCK!

yes it is a good idea untill you get the ferret toilet train make sure the ferret can not get out of it though and before you let the ferret out have your house ferret proofed

You do need a cage. Unless you will spend 24/7 at home, supervising them, they will not be safe outside their cage unattended. Even if you proof your house. Cages are really a safety issue with them. They can just get into dangerous situations too easily. When they are out of their cage, some one has to watch them always.

Preferably. At least at first. They do not come litter box trained, so unless you want to deal with a mess on your floor, I would litter box train them in a cage THEN give them free roam.