I bought some old Epson projector, threw it on a bookshelf and then went to thrift stores for random audio equipment for a setup that cost me less than $500 total. But
Epson EX3280 3LCD XGA Projector with Built-in Speaker White V11H975020 - Best Buy
9-year-old and below MacBooks and one old Epson projector, Computers & Tech, Laptops & Notebooks on Carousell
V11H473020 | PowerLite 1960 XGA 3LCD Projector | Meeting Room | Projectors | For Work | Epson Canada
V11H843060 | EB-X41 XGA 3LCD Projector | Meeting Room Projectors | Projectors | For Work | Epson Hong Kong