Jobbed out of a Hino FB for 10 years, 16 kGVW, 11k normal running weight. I could go to HD and put two 2K lb tile pallets in the back and drive home, without unloading anything (did that a few times).
16 mpg 4 cylinder japanese turbo diesel, bought it used and put 100k miles on it. Engine is still good, rust took the frame out. The cabover style has a super tight turning radius and makes it easier to manuever than the Tundra. 12 ft length, box height to top was 10' 6", so parking was height limited in some places.
Stand up storage was great with Acro Bins on three sides. Just get in and go to the job, never had to load up. There is no comparason to a cabover diesel box truck and a regular van. You have to be careful about insurance, can be a lot more compared to a regular van. A Hino will outlive a typical van 2 or 3 to 1. For some customers, it has an impressive look pulling into the driveway. Like anything else, you have to have the right work for it.
They make an all electric fuel cell version, if you can get fuel for it. And they make a 195h, which is what I would put on the list for comparason shopping.