Give some thought to the wind rating of those fittings, and the EMT between them. I used to have (hint) a 10' x 30' tarp frame I used on the side of my house down in the SF Bay Area, and it worked just fine. The wall of the house was on one side, a 5' wooden fence on the other. There was wind there, but it was a very sheltered location. I brought it along with me when I moved up here, and installed it in a fairly open area. I used 1/4" aircraft guys at each upright, anchored to 2' x 3/8" rebar driven into the ground. While I was out of town, a storm with 40 MPH winds came through and wadded that thing up like a piece of typing paper. None of the fittings broke, but not very many pieces of the EMT did; they were either badly bowed or bent like a pretzel.