It lives! Or more accurately, it tows! As of the last update I needed to run the wiring and install lights. I finally took care of that, with my awesome partner taking on the job of crawling under the trailer and fishing the wiring.
The lights are the ones that came with the trailer, I installed them sideways and tinted the license plate light portions red to give the trailer better side visibility. They are surprisingly bright for ancient lights with cheap bulbs, but I will probably paint the inside of the housings silver and get some red LED bulbs to make them really bright.
I found out the links for the tow chains won’t fit on the loops of the truck’s Curt bumper, so I’ve already upgraded them to larger snap-hooks rated for 2600lbs each.
Prior cost: $368
upgraded chain hooks: $6
electrical connectors, heat shrink, etc. $0(already had)
nuts & bolts to mount lamps: $3