Check out a google image search for mini split rv. I saw three mounting styles shown- tongue mounted on travel trailer, a rear bumper extension or rear mount, and basement compartment mount. I have friend who's into classic bus conversions and I understand the mini split has been used there-one reason to keep roofline clean, and another performance/efficiency. Condensing unit located in a large pass through basement compartment with good ventilation.
As far as I know up to 12K BTU 120 volt is available.