My comment was not for my own requirements. The original poster seems to be under the impression that the stated 4000+lb payload is what he can put into a half-ton (150/1500) van. I'm trying to point out that what can be put in a van should be considered when building out.
A lot of builds I see use 2xfours, solid wood countertops and MDF kitchen cabinets. Weight seems to be ignored or poorly considered let alone understood. Overloaded vans could be considered unsafe with insurance companies and likely to void a policy in the event of an accident.
Understanding payload would be a good idea in my ever so humble opinion. Not that my opinions come from such a place.
==============================
@itsnotliving quote "2700 on a 1500..."
I think my build is around a thousand pounds plus the driver. I can guarantee that I do not weigh 1700 pounds.
If you really need all that extra stuff, (1700 pounds of it), I suggest installing a hitch and buying a boat. Throw the extra stuff that you really need in the boat and donate the rest. You will not miss that stuff when you are out fishing in your boat.
Bob W uses a Chevrolet van and pulls a cargo trailer (Instead of the boat).
-crofter