You add a shower and/or a tub to the bathroom, then make a closet.
Really, you need to ask an actual question about the project if you want a non-smartass answer. I have no idea what it is you want to know. People here generally want to help you with layout, so get out your tape rule and graph paper and draw in great detail the walls, doors, windows, adjoining rooms and hallways, and indicate which are interior and exterior walls. Mark the length of all walls. And tell us your climate and what the room is built on (slab, basement, crawl space...). Then you will get lots of help.

We need pictures and dimensions for the room(s).

A small budget is a problem with a project involving plumbing. Just adding a powder room in our old house was right at 20K.