Solution Nine is unique. An apartment in Solution Nine would only make sense to me if you had a window to see the outside environment.
Otherwise, the Apartment could be anywhere else. Once you are inside your Apartment you wouldn't notice any difference from other Apartments in the Game.
But witout a Market Board, Vendors and a Summoning bell it soon will be as empty as the Crystarium. The last time I was there, I was the only person.
To me Solution Nine was dead on arrival as soon as I noticed that we couldn't fly in that Zone.