Very thoughtful replies here. You cannot buy the bona fide experience of those who posted above. Almost everyone is bidding you escape the "Incrementalism".
Incrementalism is a term I pasted on Jeep upgrades following the, "Jeeps are built, not bought" school of thinking. If it's your hobby, and you want to prove it can be done, then by all means get there little by little. If you want to get from alpha to omega in one pop, the highest load rated, nay, overrated dually is the one. Now that I'm out of the Jeep Biz and maybe...wiser, my advice is as others have suggested: purchase the truck that will carry the load safely, without all those costly and time consuming in-between steps.
jefe