It's unclear as to why you are saving a corner at the sofa for lanterns and other "stuff", and why the tv and console you now have, are jammed to a corner! Draw and measure the space, show where the kitchen/dining is. All the walls, windows, openings in feet and inches, Please Upload that as a very legible j peg.

Mya 30"H Blue Ceramic Fish Lamp - 29.75"H x 14"Rnd

My design book shows a 7'-6" x 3' bathroom similar to yours. The room is made shorter by substituting a pocket door in the wall adjacent to the toilet for the swing door. An even smaller bathroom, just 4'-6" x 3' is accomplished by including a corner toilet (yes, they exist) and small sink opposite a 24" wide pocket door.

Is the image reversed? It doesn't jibe with your floor plan. The floor plan indicates that the staircase is on the left as you look at the large windows, but the photo shows the opposite. Could you also post a photo looking at the fireplace?