Housing for the ferret is your choice. Some ferret owners have cages and others let them have the run of the house. It all depends on you. I feel that the cage option is preferred because they need to have their own space. But they will accustom to whatever they start with.
Ferrets can be messy so cages can contain their mess.
Just be sure to provide your ferret with a good sized litter box. Shavings, or cat litter is essential. Ferrets like to burrow, so it is suggested that you provide a blanket or a cardboard box for them to hide away in. Female ferrets are also known as bitches and males as hobs or dogs. The baby ferrets are called kits.