Looks like a great design to me
. I just order an 80 quart pot with strainer and I'm looking to build a similar rig.
I hadn't thought of the counter-top area next to the kettle since I was going for a minimal footprint, but seeing it on your design I think I'll have to add it. Having a wider base will make the "crane" operation more stable, and after thinking through a brew day, you're going to need a stable work surface anyway, why not build it in.
I'll be starting off without the wort pump, but I'll go for the ice water re-circulation pump. I've only used my 60 ft IC with tap water before, and I was planning on using a cooler with ice water to recirculate. What is the benefit of the second copper coil? I was just going to switch to the ice water at ~100 F, and let the ice water go into the IC.
Please post pictures when you get to building it.