to do in my apartment: redo the stairs

i would LOVE to buy my place.  i didn't think i would ever say that, but i have a lot of ideas for what i could do with it.  i could really turn it in to an airbnb and make a lot more money if i could add a second bathroom.  and one of my ideas is to turn the spiral staircase shown here

into a thin staircase with one change in direction.  i think i would have the opening change, instead of stepping on to the staircase on the right hand side at the top, i'd move it to the lefthand side then have it go down against the brick wall and turn once and go in to the dining room.  anyway, thats an idea and then i saw this change in staircases (from a ladder, though, not a spiral staircase) to a totally functional staircase and it makes me want to do that!  check out these before and after pics from here.