Looks good, I would try and make a separation on the patio between the exhaust and intake fans, maybe even duct the intake fans out and have them make a 90 away from the exhaust fans. Anything to prevent the chance that your exhaust feeds into the intake fan, seeing as they are positioned rather close.

And I'm sure your already planning this but clean up the walls and floor, make sure you have no loose debris or paint that could flake off of the walls, as with those airflows it wouldn't be hard for something to get picked up and run through your nice new miners. Good luck looking forward to the finished product.

EDIT: sorry I just saw the second hand drawing, what is the PTAC room that you are using for intake?