So this is what I did....
there's a cubby where my front door opens, and I hardly EVER use the front door... so... I put a big huge tarp down and folded it up at the sides (so as to take away access to the walls) and put the x-pen in the perfect little cubby... is it sightly? no. But it will do until she's a little bit older.
See photo illustrations below, as modeled by Orion and Sedona...


We'll see if it's a solution I can live with.... good thing not many people come to my front door ;-)