A Budget-Friendly Craft Room: could put two book cases on either side of the window then use a folding table coming out like this from the window. Put existing pieces I have along the wall. That will leave room for a bed or an air mattress if I need one in that room.
Use freezer paper to make your own stencil for painting on cloth, t-shirts, etc. You draw your design on the flat (not shiny) side of the freezer paper, cut it out with an Xacto knife, then you iron your freezer paper shiny side down onto the shirt--this makes the paper stick temporarily, enough to hold it in place while you paint the stencil. When paint is dry, peel off the freezer paper.