I'm taking the spare bedroom and original bath and creating a laundry room, larger bath and a bigger closet for the bedroom.
The mobile home (MH) is 12x60, but the interior dimension is approx. 11'4" wide. The current hallway is 2'10" and it will stay that wide. That leaves the laundry room, bath & closet all 8'6" wide. The only variable is the lengths.
I have worked on this design for months on paper, and a few years in my head. This is 2 designs I came up with. These drawings I did on a free program I found at gliffy.com. It was very user friendly and there is also youtube videos that show how to use it.