I built mine to hold a 33" tire and 3 5 gallon Jerry cans. So far it's doing really well! I have more work to do, but it's on and functional.
I'm on my phone so I can't add pictures, but there are a couple in my elite registry.
Some build notes.
I used the stock bumper brackets, and welded the face of them to the back of the c channel. Only problem I am having is the bumper rotating away from the truck a bit due to the moment arm of the swing out, and the extra room in the bolt holes. I am still thinking on an anti- rotation fix. As far as strength, my neighbor and I (480 lbs combined) climbed up on the swing out. I sat on the gas cans, he sat on the top of the tire, and we jumped up and down. I think we may have picked the front tires off the ground, but nothing broke, nothing bent. The channel I used had a tendency to flex/twist with the swing out open, but I fixed that by adding 4 vertical straps along the back, from the top to bottom lips.
As far as finishing the ends and sides, I am considering sectioning 6"diameter pipe to make a curved corner, then plate for the side extensions up towards the wheels.