I have mine in the dining room area of the kitchen. But that only works for me because 1.) It's one of the few tiled areas and 2.) I almost never eat at the table. My parents have one in the front foyer, and move it on the rare occasions they have front-door guests.

As a final thought, the inappropriate elimination ought to stop as soon as they're settled in, so if you can live with an office litterbox for a short period of time, you might be able to ditch it in a month or so.