Gargantuan Great Gargants

So, continuing the thought path of things that are in the future, when I get my guest army, that army being orks, I do believe I'll make them a great gargant. Why? it's cheap, it's cool, it's easy, and above all, it makes an instant apocalypse army. See, a trashcan, with some clippers or shears, instantly provides a great "dress" for the gargant. A few pieces of pipe, maybe a lightsaber toy blade or two, and we got easy good lookin cannons. Using foamboard and sprue to make all the cool little walkways. Only problem spots are the feet, the arms, and the head, but a little ingenuity works wonders. So the ultimate goal? one green tide of 100 orks and a warboss, maybe more, but that's the gist, and they'll load up in my Great Gargant. Of course it's easy to say these things, but I foresee this as an awesome thing, and very plausible.