There are all kinds of EZ Up canopies. The overall best one I have found for a reasonable price is the Encore II. The one I have right now is about 6-8 months old. I bought it at thehutshop.com and the complete package was about $250. It weighs no more than 50 pounds. However, the top is already starting to sag and leak, so I have to put a light tarp under it before setting up. It also has the "new" sides, which are thin and also leak. But I rarely leave merchandise in at night anyway. The positive side is that I can completely haul it and set it up alone. Sam's Club has been selling another canopy called the Embassy and it is total garbage. Anyone who has an Embassy, take it back, even if it's broken, even if it's old. As long as you can produce the receipt, they will refund your money because they know it's junk.
You did ask for hints. I stopped using the carrying case. I put the sides in a tote bag. I cover the tent with an old spread and hold that on with bungee cords before storing it. Always open it up at home if it got wet. Same thing, spread out the sides and let them dry.
At the show, look for someone else alone and offer to help with their tent. I almost always can get someone to help me with mine and then I help with theirs. Once your tent has been used a few times, it should open easily. If you are totally alone, go around it in circles and spread each side out bit by bit. When you get it at least 7 or 8 feet out, go underneath and lift the center and shake. By then it should be open enough for you to lock the corners. If the corners won't lock easily, it's not open far enough. Keep the tent at "half mast" while attaching the sides, stringing lights, hanging signs. Then raise it after that (you won't need a ladder). It is really best if you have a helper with the legs, as it creates a bit of stress if you can only raise one leg at a time. But if you are alone, make sure the other legs can move when you put one leg up at a time. Go in circles again, raising each leg only one notch at a time.