So, here are the updates. I did all of this yesterday...
Here's a better shot of the water change/ato station, since I got my camera back from Best Buy yesterday:
I still need to some cable management, and finish up where the pvc passes through the wall.
Here's a shot of the pvc run in the garage. I left a ball valve in there to add where I am going to remove water from the tank during water change time.
I put putty in the gaps for now. I plan on making my own flanges from wood to not only seal the holes' gaps, but act as bracing for it as well.
Here's where the pipe hits the sump. Again... not finished, but I plan on doing quite a bit more here, later.
This is the rock in the garage. I've done 3 water changes since I put it in here, and the skimmate was starting to clear up. So, I moved the rock to the tank, and will start the cycle after the sump is full of water (last batch brewing up now).
Basically, from here, I just started running water to the sump, then I'd turn on the return pump to put it in the display.
Since my camera just got back, I'm still working on the white balance issues... All my settings were lost, so I took some pics with flash:
This was just about all my first transfer could do.
With rock moved over (not 'scaped as of yet). This is how it looked when I woke up this morning.
Here it is now.

Again, I still need to fill the sump, but so far so good!
That's it for now. Something that I noticed, and already knew would come up, is my lack of flow. There's not much in the system right now, but I'm going to try it out this way for a bit. The system is extremely quiet as it stands!

Stoked about that! Obviously, I don't have the skimmer or return running yet, though. LOL