I think I will be able to swing the sub with everything else. I just have to keep the overall price tag under $10k. That includes projector, screen, speakers, and seating for four.
I am going with the Epson 5010, Carada screen, leaning toward the Focal speakers still, and the biggest HSU sub I can afford. Hopefully I can get a good deal on the speakers. Now to figure out the seating.