> A not in use bed, or a not in use back seat?

A not in use back seat takes up far less space in a sane car than a pick-up truck with a bed.

> Much better visibility than any other vehicle I have, too.

At the expense of others. And good luck seeing a small child in front of it if you're driving in a moderately pedestrianized area.

My s-10 is 190 inches long by wikipedia. A same year Honda Accord is 189.5–191.1 in long. The accord is marginally wider.

Driving alone in my s-10 takes the same space as driving alone in an Accord if I had one. And it's easier to see around or through the S-10, so everyone gets more visibility.

The S-10 hood height and length is more than an Accord, so there may be some additional risk there, sure.

Either way, a cabover design like the linked vehicle should appeal. Better visibility to the front, and less wasted space.