Need advice on how to make a projector screen fit into an area
Definitely go with the ceiling mounting. However, I prefer simple, clean &amp; neat.

(1) Is the setup I prefer. The top hook (4) is best, as it screws into the structure's framing, if you can find it. If not, then (5) can be screwed into the drywall or plaster to receive (4). (2) &amp; (3) also use just the drywall or plaster &amp; give you positioning flexibility. (6) can be an open or closed  (carabiner) S-hook or even just a nut &amp; bolt with washers, so just the top of the chain is removable.