So you’re advocacy is to not make it as you’d not actually buy it?
Why a projector? Any image based on reflection necessarily has to be inferior because you’ve increased the distance and added a surface.
The portability is the key difference you can move it and pack of away which necessarily means lower quality.
Someone in real life yesterday asked my advice on getting a projector for a Xmas or present. I had to explain either spend a lot of money or disappointment, and someone else moved from a projector to a LCD screen because they were fed up with having to draw the curtains. In both situations the outcome was to a used LCD panel, a 45" for < $100