Wow did I burn up Tapcon bits drilling in the basement. I don't envy this job.
I may have missed it, but is there a reason you can't mount it on a shelf on the rear wall? Alternatively it may be easier to suspend a shelf from the ceiling vs mounting the projector to the ceiling.
Hammer drill will work. Just get a high volt one or an air driven. Not something I'd cheap out on.
Also, cable management is kind of out the window with a cement ceiling...
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