Oooo a 69'!
I'm not an expert at this by any means, but looking at it from a buyer's point of view... some of the stuff isn't original anymore, like the fridge which looks modern (does it run on propane or just electric?) and maybe other appliances (I don't see a stovetop or oven, does it have one?)
The broken front window is a bummer. Have any of the other windows been broken or replaced with plexiglass? Did you replace any of the plumbing in the walls and does it work? The A frame looks good, was it rusty before? Have you laid eyes on the frame underneath the trailer, and is it in good shape or covered with a rust-resistant coating?
The air conditioner looks original, does it work?
Yes I have a lot of questions, but I'm also freaking out a bit because you're only 3 hours away from me and a half-done trailer is kind of exactly what I'm looking for. Have you put it up for sale yet or already sold it off-site?
If I ask a stupid question, it's because I'm a newbie.