minivan

...at least if you have a family, and need to transport datacenter racks.

Consider this:

• You can fit full 4' x 8' plywood sheets in the back (assuming you fold down/remove the seats)
• You can fit up to 12' long dimensional lumber (1x2, 2x4, etc.) inside (passing it through the gap between front seats)
• You can seat 7 or even 8 people inside, somewhat comfortably, with at least 2-3 cupholders per person (still preserving 20-30 ft³ ((0.8m³) of storage space in the back!)
• You can fit a full 42" deep 42U datacenter rack in the back, with space left over for one or two 2U 1500VA UPSes

From: Look at my HUGE RACK! (moving vlog 11).

All that, and all 140ft³ (4.2m³) of interior storage is fully enclosed and climate-controlled.