Just out of pure curiosity, why do you wanna stay away from diesels?
The weights your pulling with the business, as well as occasionally pulling an RV, and towing regularly, it sounds like diesels would be perfect for you.
I also understand some folks just done care for diesels which I get. Just sounds like you'd be all over a diesel which has my curiosity up.
And FWIW, I have a buddy with the 6.4 Ram and he loves it. It does however have the 4:10 I believe which would be a must IMO. No personal experience with it though.