You do not want to be in a show that will allow blue tents. White
only. I have not read all the other replys, but I suggest, buy the
best you can afford if you plan to do this for a few years. A really
good tent can be resold. If you are not sure if you want to do this,
buy one from Sam's for 100 or so. Or a used one. If the roof is not
water proof, you will need a large sheet of plastic to protect from
rain...because probably the only time it rains in LA is during an
outdoor show. Some shows will let you set up a tent indoors, without
the roof. If you have to do most of the set up and load out by
yourself, buy something light weight. There will always be someone to
help, but get the tent you can do almost all by yourself.
Go to a show and see what other people have done to stake down their
tent, hold the roof up incase of rain. Look at the material, is it
flapping around, or sturdy. Usually the brand label is somewhere on
the tent. And, not all EZ ups are made the same way.
One of the biggest things to think about is who you have to help
with set up, and how much room you have to store everything.
And, be sure to get all four sides, so you can zip up at night.