I love doing outside the box things. I have an 11k roof air that is too loud, OK on real hot, humid FL days and too big at night to keep the humidity down.
I wanted to run my old Toyota Rv on a 2000 watt Honda. Doing some websearching I came to the conclusion that an 8k window unit would serve my purpose.
I purchased an 8k LG window AC w/remote and duct taped and bailing wired it to the Toy and found in direct sun on high 90's Florida days with high humidity it was just sufficient and worked well on the Honda.
Next was a donor roof ac for the base and shell, not an easy find, believe it or not.
I started to convert the window AC to the roof air and ran into some issues, really needed a sheet metal brake and did not give myself enough time, plus the LG was probably not the right choice for this project.
I was running out of time to get ready for a 3 month trip, so put the AC back together and put it in the bathroom window. Not pleasing to the eye but I would rather be cool than look cool.
I have used the 8k with the Honda 2000 for 2 long term trips and several short ones. It works very well, nice and quiet, easy on gas.
I still have the parts I need to convert it and will get back on it someday, just not today!
Keep us posted on how you do.