If you want a large screen, but don't want to pay out large chunks of cash then the Alien Tech LCD projector could be a good option for you. It costs £149.99 from Menkind and can throw a 60" screen on to a wall. It weighs just 1.5 kilos and easy easy to transport around. Built in sound also eliminates the requirement of carrying around speakers. It will connect to a TV, DVD Player, VCR, Camcorder and all the games consoles.
It will project larger then 60" but that is the optimum screen size for good quality.
Not a bad idea and not a bad price at all. Available from here.