In other words you have no time frame as to when you wanna build it? Hope you don't mind me giving this advice...
Don't fall into the trap of planning for the perfect tank. Might end up always chasing after the best and newest technology/equipment/way of thinking, then end up no tank at all coz its a neverending cycle.
Or by the time you get down to building the tank, some other factor comes in like kena posted overseas, or wife don't allow (when you have settled down) etc. I suppose the good part out of this is you prob save some sweat and money
Best is to keep it simple, have the basic idea, talk to tankmaker on design, do up all the fail safe, you're good to go. I love planning too! but I prefer looking at my fishes swimming and corals swaying