800 SF. Wow, you're gonna hurt after that job.
I recommend a hot tub and/or heating pad to repair your body each evening. You'll be pleased with the end result, though.
Agree on the thinset under Hardibacker. Tile and stone is good for a lifetime. Why compromise on the install?
I use screws, but the roofing nailer sounds like the hot setup.
KT, the local tile place has a Rubi bridge tile saw on closeout for $990. Do you believe there is any benefit to the bridge saw vs the typical tile saw with sliding tray? I would like to upgrade and am comparing the slew of different saws.
BTW, I prefer using metric tape measures when laying tile. It's a lot easier when measuring for cuts and also when laying the grid. I have no idea what the pros do, but it works for my brother and I.
jurgen