A projector is a very good way of getting a larger screen size, and works effectively if done correctly. However you have to be cautious of the resolution of the projector, compared to how far away the projector is. How far away from the wall you will project onto is the projector going to be? If its around 2 meters away, then there isn't much point getting a high spec and high resolution projector, but if you are projecting really large (from far away) then you will need a way higher resolution, or it will just look terrible.
Hope this helps!
-Pi
