I like what you have started it looks good so far. Its crazy theres already 250lbs of rock in there. Hope your RODI expansion unit comes in sooner rather than later but I know you still have plenty of other stuff to do.The wiring is boring but with so much stuff needs to be done. I have 9 WAV's 4 MH lights 4 T5 and this is just the wire coming out of the display. Thats 17 wires.
I have aquascaped all of the dry rock I have about 250lbs. So no more aquascape until the tank is full salinity is right and temp is right. I have another 300+ lbs. but its all old established live that is currently in my sump with my livestock.
Here is a pic of what aquascape is done. You can see the water s now up on the glass.