Can you post some pictures, please?

The wall opposite the couch could hold the TV - would need to mount it on the wall and that would take a while as we would need to get someone in to do it (I love my husband but he's not the handiest). Where the photo was taken is a three seat couch, so couches are in an L shape.

Moss. Preferably the thick dense dark green kind of moss that looks like a carpet that grows on the north side of embankments where little sun reaches. How close is your nearest state or national forest or, in the alternative, the nearest dirt road with an embankment that gets little if any sun because of shade trees. Take a drive and/or walk and see what kinds of moss you can find and take some pics. A dozen or so pieces would likely be all you need to get it started because, with the right conditions -- shade and moisture -- it spreads. (Ferns like shade but usually do better with drainage. Moss likes damp but will not grow in a puddle.) Where you have windows, you could create a "view" : With a concrete planter (or on concrete pavers set a large clay planter) with a trellis with English ivy. Alternately, you could buy your own pieces of exterior grade plywood and use deck screws to affix them to the fence posts and horizontal supports of the fence and decorate them w/paint and/or planters and/or metal sculpted art --- get creative.

Looks like the palm tree look is working so I would blend that with some succulents maybe agave which can grow large and make great statement plants. Also stick with the stones.