Well, here it is. I'll post some updated pics once I get the burners mounted and propane plumbed in.
The steel was some 2" scrap that I was given, and I welded it with some help from my brother, so the total cost of what you see is $0! This was my first attempt at welding EVER, so I'm very proud even though the welds are ugly. Total time to cut, weld, grind, paint < 3 hours. I can't believe how easily everything went. It's not quite commercial quality, but I don't care. I get a much bigger kick out of things I do myself.
I can't wait to use it. No more stacking crap up to get one pot above another, and no more lifting scalding water above my head! The other thing is I've got the capacity to do 10 gallon batches now and I think this will make that process much easier.
I've got an idea about how I'll do the plumbing, but I'll take any advice you have.