I use thrift store speakers for my home theater. The speakers were $20, the stereo to drive it $20 from the thrift store, the bluray player for $40 from the thrift store, the screen was $50 for the canvas from Amazon, another $50 for the lumber to make a frame. The only pricey thing was $300 for a projector from Amazon. A few more bucks for a ceiling bracket & cables. Lately I've been seeing projectors at the pawn shop for pretty cheap.

I'm very happy with it. It's HD, and 102 inches.