How does renting negate this possibility, in specific terms? I bet I can find a workaround.
Motorized may be cool, but is unnecessary, and the only benefit is the convenience.
You can always take your PJ to your next residence. You can also take the mount with you, just patch up the spot when you leave.
If it must be setup so that the screen falls over the flat panel, and you want to do this on the cheap (if only because this may be for the short haul), then I recommend DaLite High Power manual for roughly $250. There should be some available ceiling mount brackets that I doubt would cost too much. This screen is the best choice for a non-tab-tensioned screen ($$$$) as the waves are difficult to see after time (and according to many testimonials, it's impossible to see). It's what use, and I notice it maybe for a short moment, once for every several movie viewings, or something like that.
No one, not a single soul, ever, ever, has noticed it at my place, besides me. I have friends who have probably seen 50+ movies at my place, too.
$250 for a nice, universal, super adjustable mount/pipe.
Whatever else you have left on the PJ.