Your trailer is very nice.
I see you changed out the fugly AC to a nice low pofile unit. I had a Caravel
with factory air. That AC unit mounted in the middle of the trailer. The roof is ribbed to support it in the center. That left the fan and vent intacted at the rear. The arms on the aircraft doors were shorter on the front doors so they would not hit the AC. The drip went into the kitchen side cabnets and down by the hotwater tank. The old Univolts in these unit supplied 19 volts DC to the ceiling fan and the range fans. It also supplied 12 volts to the lighting/waterpump.
I would get some aircraft cable and tether the access doors. I you forget to lock them there gone and you can't find replacements.