I can give an idea of the T@B perspective. I have a T@B, but we have the clamshell model so the awning is not an option. But on the other floor plans, there is a channel that runs all along the roof line, and that awning that you see pictured slides into that channel to attach to the T@B, and the outside edge is like an arched tent pole that can be staked to the ground. I don't recall the price, but I know it isn't cheap, somewhere between $300 and $500 if I recall correctly. Some dealers throw it in with a T@B sale.
Cheryl and Randall
2006 T@B Clamshell