A refrigerated truck is insulated on all sides of the box including the side door and roll up door. The bottom is even foam insulated. They are next to perfect. Simply buy the truck and rip out the refrigeration system and sell it. This makes it good for your use in areas where you want to keep the truck from freezing. By the way my truck is an ex-refer truck.
This particular van is the perfect length (14') and has integrated side steps. It is also priced well. The only thing I wished it had (but is not all that important) is a drop floor bed in the box. That would allow ever easier entrance into the truck.
If that truck was around here I would grab it. Trucks like this frequently come up.