A few TC questions about host trucks and factory add-ons

I was reading an article, fella had what looked like a utility truck with a TC on it.....this is what you all are referring to? That would be super handy. I had assumed that such a 'bed' would be a lot more expensive than just a regular ol' pickup bed. Oh well, more to research! LOL

And yeah, I'm contemplating full-timing in it, as it'll just be me (upon retirement....something I should have mentioned, sorry!).