Most units over 30 feet have a wire run to the bedroom vent. Remove the trim around the bedroom vent and you will probably find a 120 volt wire. You can install a second A/C with 30 amps, but you will have to install a control box that will not let both compressors run at the same time. You can buy these at camping world. The control box will let both A/C's work, but the compressors will alternate running, so both will not come at the same time.
1998 Pace Arrow 35 ft. F53 Ford V10 2012 Honda Civic toad
15 year motorhome service manager. 3 popups....2 travel trailers....5 motorhomes....loved them all.