I’m not frugal, just a cheapskate. I have an i5 NUC that I got for 225$ Canadian, so like 16$ USD… (I exaggerate.) I got an old 1080p projector from an Electronics Recycling in town for 125$ CAD, and a receiver at an auction. No remote and the HDMI in was busted, 40$. So I used a USB sound card with optical out. (Another 40$.) Speakers from goodwill. The wall I project to is already white. I have an Ikea Kallax with the receiver and the projector right behind my couch. Speaker wire is scrap cat5 cable from work. The subwoofer has an annoying buzz at the moment, but it was 20$ from Goodwill, so… Otherwise, it’s big, bright, loud. I cobbled it together over a few months, but it’s a great setup and very cheap.