very nice being able to weld has it's rewards
I worked in a foundry doing maintenance for 41 years one thing I miss is being able to build "home" projects.
I wonder about the back of the AC unit getting bug strikes going down the road smashing the fins on the AC.
one thing I saw you used galvanized street-ells to pipe in your propane, while you most likely won't have problems black pipe is used for any gas plumbing
it seems galvanizing can flake off and cause gas appliances to be come plugged and not work right.
once again congrats on your trailer.
pete