If you're not particular about your video, I found an old 3 tube projector on Ebay for like $200, bought a manual screen for $50, and have a 80" diagonal picture in my living room. I feed it S-Vid from either the DVD or a Tivo, and viola - instant large screen. Its not a Faroudja line doubler setup, but its fine for the kids to watch disney movies on. The late nite movies get more... interesting also.
Of course, you need decent tech skills to align the guns, and you need to get used to sitting under an 80 pound box hanging from your ceiling (this is when you find out how much your friends trust your carpentry skills - by where they sit).
Noone wants the old PJ's now that new ones weigh 3 lbs and can be set up by an ameoba.