Started working on the water tank. I found a 34 gallon RV tank that fits perfectly under the frame of the trailer, above the axle.
Of course, it didn't come with any holes in it. So I had to order an access hole cover online, wait for it to come, realized I didn't have the right size hole saw, ordered that too, waited for it to come, and finally put the access hole in so I could get my hand inside to screw in some bulkhead fittings.
Now I needed a way to hang the tank under the frame of the trailer. I took some 3/16 x 1.5" steel bars, heated them up in my foundry (because I haven't built a forge yet, but it worked just fine for the purpose), and hammered them into shape to fit around the tank.
Welded in some supports across the bottom, painted it with some truck bed liner, and bolted it up to the trailer. I'll be supporting the bottom with a sheet of plywood as soon as the roofing tar I sealed it with dries.
I made a bracket out of a piece of angle iron and attached a third power port under the sink in the back. Since it's behind the 2x4 frame, it will sit behind the cabinet doors when they close.
Also hooked up the second light for the kitchen. They're a pair of 12v 10 watt led flood lights, and they're really bright. This picture was taken in the garage with the lights off.