don't have time now to post a link.
perform a search for a video-projector stand.
i think is the best solution for "fast" set-up.
anyway, the stand must be placed on a good spot, to avoid people touching the stand and knock it down.
also at least 2 cables will go to that projector so it's a good idea to use some duct tape to secure the cables.
maybe I'm wrong or thinking to far...
but, as long as a piece costs 10keur, would you let it on top of a tripod made of few sticks, be it for professional use or not.
I rather prefer the use of stacked empty light cases, already present on any event, be it huge or small.

heya, pro's! give us some suggestions!!!