A Honda minivan can fit 4x8 sheets of plywood in the dry, under-roof, with the doors closed. Other times, it can seat 8.
The venn diagram overlap between people who say "but minivans" and who hand wring hard enough to start a fire when someone has the gall to actually put 2000lb of stuff in a minivan or put a butt in every seat is too close to a circle for my liking.
Source: Minivan owner
Unfortunately, to Americans, that really doesn't matter. Even if they're not as fit for purpose, they prefer pickup trucks to minivans. It's a cultural thing.
(I realize you're probably being responsive to the word "need" - it's more what they claim they need than actually need. They could use a Japanese kei truck.)