I don't know about very rich — our spare room is set up as an office for WFH, along with a sofa bed, and I put a 100" projector screen on the wall opposite the sofa. A second hand projector, new (but not all that expensive) Denon surround sound system with speakers from an otherwise-junk 5.1 PC speaker set, and the experience is better than regular cinema. The best bit? I can turn the volume down as much as I want to.