This looks amazing! Great job!
Couple question/comments though.
Did you end up adding shocks as well or is it not that bouncy?
If it's not too late and you don't mind welding on your back, you should probably add some gussets if you're taking this offroad. It would be awful if your trailer's wood framing starting getting damaged from the trailer frame flexing. That spells water leaks
As for electrical, don't use the trailer frame for a common ground, run ground wires to everything. Especially if you plan on adding AC electrical in the future.
I hope mine turns out looking this nice!