Got it installed tonight.
No fish for a day or so, I've got an algae eater sitting in a big bucket with a bubbler in the garage. Fish guy says to take water from my tank and put it in the bucket a gallon at a time over an hour and then pour him into the aquarium. Other fish in 3-4 weeks, if he lives.
I secured the tank to the wall using plastic coated aircraft cable and wire clips and turnbuckles. I have on atrium against the wall so the cables went through the 4"x4" posts in the walls at the corners and I shimmed the space between the wall and the tank. I have cables at the top and bottom and they're hardly noticeable. The cabinet I reinforced with a shear panel in back and inside metal corner bracings and it's secured to the wall as well. Later, I'll build a nice wood canopy with crown molding and finish plywood over the top and sides at the back to hide the shims, pumps, wiring etc. So far, I've invested about $85 in it.