Yep..
" Looks like mold got to the interior. Consider the cost of changing every gasket, moulding, hose etc. Probably needs repainted. Needs a whole new interior. Even the horn button looks moldy."
That mold, if not removed CORRECTLY, can smell really bad, especially when you turn on the heat/ac, or the ambient temps go high....Got allergies?? Forget breathing those fumes.
If that mold is growing on exposed surfaces, imagine what's in the heater box, ac/heat ducts, etc.
Rad core rotted, heater core rotted,,,NASTY!
Seeing what that clown has done to the GN, can't one just imagine how well the 57 is "engineered"!!
Sad....Maybe, $5k. [I see at LEAST $5-7K to "restore" it.]
As for the resident. Scare him really bad, he'll fake cardiac arrest, grab his nasty a$$, w/ a gloved hand, and "evict" him/her.
I've had them get in my crawl space. NP w/ a welding glove! MACE works well, too.
He'd make a nice lunch for the coyote in the woods, behind my shop!!