I have a large laundry room I want to split in half and make into a small bathroom with a toilet, small vanity and shower stall. The west wall is the exterior wall, the north and south walls are pocket doors, and I want to wall in the east side and again have a pocket door since the space will be tight. Is this possible? Do I plumb it up through the floor instead of the wall? What about the sink and shower drain? What about venting? Do I have to just run everything along the walls and paint them white to match? HELP !!!!!!