For about 2k dry pin weight, you'll want a truck with at least 3500 pounds of payload. You'll add a 200 pound receiver, another couple hundred pounds of things stuffed around the hitch, people and stuff in the cab, and that dry pin weight will go up by 500 pounds when you stuff the basement.
3/4 Ram diesels have 1500-2500 pounds of payload - not enough. SRW 1-tons have 2500-3500 pounds - borderline. Dually has over 4000 pounds - winner!
I agree with jeep1 above. Besides the payload, I think you will be a lot more comfortable towing a 40' 5er with dual rear wheels. It adds a lot more stability.
Find a comparable bed/cab/drivetrain truck on the dealer lot and look at the tire and loading sticker for available payload.