first, you have to decide whether you need a quiet one or not.
if you plan on camping in developed campgrounds, with neighbors, an quality inverter generator is needed.
but if you'll only be using it while boondocking or things like motor races and no one will be close, an open-framed contractor generator will be fine and much cheaper.
you'll need at least 3000w of power for your 15k a/c and maybe more.
or you can get something like an Onan that's designed to fit in the generator area on 5th wheels, if so equipped.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC