a few moderately sized trees and painted them white with a power sprayer. supported it using cement in a one gallon paint bucket. The windows were hung from one another using airline cable and were arranged in a curve to make the stage appear smaller.
Do you have old light bulbs that are not broken? Instead of just throwing them away, you can repurpose them as some creative things. Check out this list of Creative Light Bulb DIY Ideas and try one of them.