I modded a 8k window unit for my little Toyota to run with a Honda 2000. I have 3 DIY minis in my house and would have installed a mini in my RV years ago. But I have no room for the evaporator, inside unit. The blower wheel may have to be removed from the AC and on mine need to be pulled out of the left hand side, varies by manufacturer. Removing entire unit is an option. Which means the space on the left needs to be as wide as the unit. Other than that the inverter minis would be ideal!
For my Toy the only area to mount would be someplace on the rear.
https://www.google.com/search?client=firefox-b-1-d&q=How+to+remove+blower+wheel+from+Daikin+Mini+Split%3F&stick=H4sIAAAAAAAAAOOwUWJzSczMzswz0srIL1coyVcoSs3NL0tVSMrJL08tUijPSE3NUUgrys9VyM3My1QoLsjJLFnEauRBQDHEUAVfkJ5gkB77JjY7Lna30qzMkuJSIWNC-qEKkSwFGuDMxQOWdE4sKspMLSJsClQhqjNcuLh8QWYnZRZnZAqZETIjF64W1TE2XNCQEyIrMCy4WEOKEvNShfTx6M7PUygBKUK12YiLPSAzPy8VGALqUAaSAlQTwKYm5jSxGXOxuBelpgppo1qXDhTDpdl-AhsjAL-ua5khAgAA&sa=X#kpvalbx=_NL1NYZXrBbeGwbkPwYi9yAg5