I used to use this brand of bed extender to carry my AI in the back of an F150 5.5 foot bed. It looks like it is a few inches longer than the T-Bone, but does not have the radius bend.
I liked that it was easy and fuel-efficient to haul three hours to the coast, and it did fine on the bumpy 20 mile drive down the beach. The extender doesn't take up any storage room, and was cheap to buy. What I didn't like about it was that I couldn't prearrange my gear in advance of a trip and have it ready to go, and that the boat and accessories took up just about all the room in the bed. I tried launching the AI off a boat ramp with it, but it was easier just to strap my C-tug cart to the boat and roll it into the water that way.
I think that the sixteen foot AI was about the limit that this setup would accommodate. An 8-foot truck bed would be much better for the TI. With the 5.5 foot bed, the center of mass of the AI was just inside of the extender. A TI would have the center of mass outside of the extender and thus be fairly unstable. However, it might be possible to build some type of support sled which would stick out past the extender. For short drives without a lot of gear along, it might be just the ticket.
I also liked the looks of the Thule Xporter and similar bed-rail mounted racks which get the boat up above the cab. The weight of the TI would make this a hassle, but it could be done.
When I take my 12 foot kayak or the SUP board to the local lake, I very much appreciate the ability to just throw it in the back of the truck and go. However, if your budget, storage location, and launch site parking will accommodate it, a trailer is best!
-Chris