I would agree, this thread has slowed down alot.
I didn't do any remodeling of my trailer. I'm still considering a bathroom.
I did, however, make an improvement. Our brake is in the trailer. We had a job that needed alot of aluminum. So far I've gone through 5 rolls. This means someone is in the trailer, most of the day, bending. The first day, it was me. It's been in the 90s. We have fans, but that was just blowing 100 degree air.
The second day, I installed an air conditioner. Just a small window unit. I built it in, right inside the walk door. We've never used it anyway. Just opened it up for some air movement.
Now we can shut the door and you don't even know its there. When we want to use it, we open the door and plug it in. I made an aluminum tray, that can be folded down, when not in use. When it is in use, fold the tray up and it will catch the condensation and extend it outside the step.
We still kept a fan going. At least one of the barn doors are open during the day. Still keeps it fairly decent in there.