Toy Hauler Truck?

Grit dog wrote:
Can only haul 2 people comfortably, like you said. Non starter for long trips or families.
Doesn't tow well, compared to other options. That combo is a guaranteed pooch in all but flat towing down the road at low altitude with the wind at your back.
Overall comfort. A stripped down F350 reg chassis cab is not exactly what most people expect for passenger and creature comforts.
Cost/benefit. Most people use their daily driver pickups to tow their RVs. Dual use benefit. A personal box van, if not a rental scenario, is even more useless unless you're going to home depot. And the appearance thing and lack of practicality of using a 16' box van as a daily driver.
Appearance. If I'm moving stuff, I'm moving. If I'm on vacation, I don't want to look like a homeless person driving a Uhaul.
And, no, I've never seen any rental 6pack box vans. Gonna say those don't exist. If buying a crew cab chassis with box, refer to the 2 reasons above.

I applaud the ingenuity and yes it works, but there's a reason it's not a thing, at all, for recreational RVers. Although dirt bike race teams do it all the time. Different application, really.

The 2/3 passenger limit is really the only downside I see. 4 Door van chassis with boxes are actually pretty common in Europe. I just haven't seen them in the states.

Or something like this:
https://jingletruck.com/2016-dodge-ram-5500-69596

I see no reason to expect it to pull a 25ft TT any worse than your average 1/2 ton pickup that is the typical vehicle for towing that size trailer. Might even be better aerodynamically since the van frontage should match the trailer pretty closely, so the wind only gets one shot at the frontal area.

If you are just buying a used Uhaul van, sure it's stripped down but if buying new or retrofitting, no reason you can't fit nice comfy captains chairs and some of the bling from more up scale vans.

Might look a little goofy but I wouldn't expect it to be much worse than commuting in a full size pickup. I've driven them in the past and nothing particularly difficult, certainly no worse than the folks who drive dually pickups as daily drivers. Plus go back 30-40yrs ago and most people would think it's goofy to drive a dually as a daily driver. Mostly perception.

I'm guessing most people just never thought of it...I didn't until I saw it. Might also be the marketing departments. Do you want to sell a $20k bog standard TT or a $30k toy hauler TT. Likewise, more and more, pickups are the proverbial Cowboy Cadillac's. I'm sure the Big 3 don't want to encourage you to buy something simple and practical for under $70k.