Not a bad looking low budget coach!
I get a kick out of what they did with the roof A/C... it looks a lot like my rear A/C. But then I did mine that way as a temporary way to cover up a big hole in the skin. See the attached picture.
I believe those A/C units are regular roof top units from the 1970s. My neighbor has an 1970s motorhome and the A/C units look the same.