I can't speak to your weights, but one of my generator options mounted on front is this:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 Although I don't really take that on trips. What I opted for was putting two of these in:
https://www.goalzero.com/shop/portab...r-station-app/ with 800 watts of Solar. And then this for no sun days:
https://www.homedepot.com/p/Baja-900...erator%7D%3Aqu
I use the baja generator to run "super chargers" for the Solar Generators. So I have two independent 1500 Watt Electrical Sources inside the RV.
I recognize my setup would not work with a 15,000 BTU ACU unit, but it does work with my 5,000 BTU setup (all night long, with no noise). That said, the Champion I own would run everythign I have and more using propane I already have on board with a remote control to turn it on and off.
I use this for the genset mount:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1