Without getting into all the numbers a 3500 SRW ( full 1 ton not 3/4 ton) should be the minimum choice. The price between a 2500 and 3500 is negligible however the 3500 gives you ample payload vs. marginal payload.
A dually is the ultimate, but I agree everyone does not need/want a dually.
However everyone should want a full 1 ton truck for the additional payload.
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I have a 2020 GMC AT4 crew cab long bed 3500 srw and the e rated tires that came with the truck LT27565R20 are rated at 3,750 a piece. I tow the Raptor 355 toy hauler 17,000 GVW when fully loaded I'm lucky to see 8mpg. Tows and rides great.