I started an experiment today.....put some Oil-Dri in a bucket of water with some air agitation....just testing to see what it does.....hopefully it stays cohesive. We have several different oil pickup media at work, and its possible what i was recalling earlier was a different product than Oil-Dri.
As for reef versus planted.....both somewhat high startup costs, but, similarly, most of the stuff lasts for some time. For me, the stand is cheap enough, only a bit of time. Some of the other stuff, not so much, but certainly no worse than reef. And on a positive point, if something does die, will be relatively cheap!
I did see some dude precharge his oil-dri with a sprinkling of Osmacote just prior to putting down his substrate as well on Youtube....I do kinda of like the idea what the clay substrate will absorb nutrients in the hope that it can cme out later....wont get that with plain gravel or sand.
I have time....will do the stand first, once I get the tank in a couple days. Likely that will take me a ways....then probably get another canister for water movement, my existing one for the CO2. Tackle the lighting thing....I watched the DIY videos....often seem more fish-oriented, and no real data on PAR values with that setup. Plus, this thing is in my livingroom, so, dont really want the Jed Clampett look there for when the Architectural Digest folks come over to take pictures

. Still, no reason to rush.....Ive a few ideas. Then the CO2 setup, run it with no lights, no plants, no fish...watch what the substrate does with the pH. Fine-tune stuff. Not even doising at this point. Add some plants, wherever I might find some....most likely mail order. It gets planted, I start dosing a bit. Once everything tests ok, put some victims...er...fish in there, and we are off to the races!
Another plus....girlfriend likes the idea!