Unfortunately, it just isn't feasible to do that; the projector is optimized for our room and I've spent a pretty significant amount of time tweaking the lens memories to demonstrate on our setup- traveling with the projector would mean that nothing is as good as it could be.
By demoing in the projector's "native" environment, I can show the piece in the best manner possible and you get to see just what it can do. In our case the only possible difference between the demo unit and an actual customer unit could be the aperture plate installed and the output capability (one can choose various levels of output for desired contrast capabilities).
Considering our screen is 12'x6' and Microperfed Studiotek 130, I think that we're capable of showing the unit's performance on pretty large sized screens (12'-bigger) as a decent approximation. Pat measured our peak white at over 40 FtL, so I have to figure that's enough horsepower to light up 14-16' screens pretty well. And for the person that has the 10' wide screen- you can reduce the size of the aperture and the lamp output (ours is set as low as you can make it) and receive better black levels and contrast.