If painting a projector screen on a wall is not going to work for you then this foldable and portable projector screen might work for you. The screen is able to fold and unfold in just seconds and is easy to carry around where ever you go. There are 3 types available which are 16:9, 4:3 and self standing tabletop versions. The diagonal ranges go from 40 to 88 inches which is a fairly nice sized portable screen. Prices go from $175 - $345 for the screen, depending on which size you choose.
Via: BornRich