Wormy, just bought one @ pep boys. $79 with a $20 rebate= $59! I also bought an extension kit which either closes off the sides or extends the roof out 7' on each side. The brand is Shelterlogic and they make different sizes and basically 2 grades. The one that I bought is "regular", 3 legs on each side, 1 3/8" diameter. The heavy duty has 4 legs up each side and 2" legs. The extension kit was $79. My plan is to eventually have 2 or 3 of these hooked up together for a walk thru. I don't think that they will be too hard to put together, they have to be better than the $30 canopy we bought years ago that was made of 1/2" pipe, about 300 pieces! Usually with this sort of stuff, the easiest way is to sort the pieces by number, then assemble all similar pieces, in this case the legs, and put them aside. This gives you alot less to look at and be confused by!
I used to have a party rental business, and when building the tents, you build the top first on the ground and then lift one side at a time and insert the legs. It's not that bad, but two people definitely work better than one, a third would make it even easier.