Now wait a minute… So what you’re saying is that you are going to build a frame so you can tow a tent around? The whole point of a tear is that there is no setup, no? Stop drop and roll [as it were].
I’m not getting it. In the first case, with the geodesic construction its light weight and a bit cool looking, but now you degenerated into a folding test on a platform… hmmm
If you are going there, it would seem like folding composite panels might be a good way to go as they offer much more protection (there are pop-ups like that).
But… back to the original concept (if you still care). One thing you could do with the conduit is get a tube-bender and just bend it to the shape you want so that you could avoid the cost of all of the couplers. You could probably rent the tube bender, but even if you had to buy one it would be cheaper that all of those fittings ($40-$90 dollars). You could even figure out a way to lash them together using [baling] wire (though it might be getting hard to find since everybody uses twin now). If the canvas is well fit there shouldn’t be too much flapping about.