We have guests coming and needed one more bed and decided to make a temporary bedroom in our storage/ work room with a promise to my husband that he could have 'his' room back afterwards.
With finished walls and ceiling and large window already in place, it was a matter of disguising the workbench and make it making it inviting for a single guest.
I found a folding screen second hand, used a area rug from another room, stole a bench from the garage and covered it with a vinyl tablecloth,for luggage, added a clothes rack from the laundry room, and a cute stand from the porch.
Bought a twin air bed and folding frame, used double bed linen and comforter I already had. The wall lamp I had stored along wih the nightstand. Used a piece of scrap diamond plate for a valance.
After my guest leaves, everything can go back to its original home and folding screen and air bed will go to the closet.