The poles just come by themselves.
I made the guylines by just cutting a 100' roll of 550 paracord into the lengths I needed, and then put a NiteIze CamJam at each end. Aluminum tent stakes... about a dollar a piece. 6x8 heavy duty tarps are anywhere from $5-$10 and a make-your-own tarp grommet kit is 5 bucks.
Poles = $80
100' 550 paracord = $10
Stakes = $5
Grommet kit = $5
6x8 HD Tarp = $10
Tarp bungee balls = $10
8 NiteIze CamJams = ~$30 (I probably could have done something cheaper here but whatever)
So I'm probably into the whole thing for about $150, but that's deceiving, as literally every component has multiple other uses when I'm not using the stuff as a a shelter or awning.
Plus, none of it is tied to the trailer. I can move it all to my Jeep and make one off the Jeep's roll cage. Or not tie it to a vehicle at all, and instead to some trees, or just freestanding.
You can also cheaply use different size of tarps, depending on your imagination. I may buy a gigantic 20x30 tarp or something like that so I can cover a whole campsite. There are also mesh screen tarps, tarp zippers to make doors in the tarps--let your imagination run wild. The Kelty poles are also adjustable and will go about 2' higher than I have them set in the photos.