Anywhere, any time! It's best if you go to Cons though, or cosplay with a group of friends, it makes it more fun.
You can't buy the entire outfits or horns from anywhere.
Try the cosplay suggestorator..
You should cosplay your favourite character from a game or anime or anything in general.
There should be a cosplay store in the United States, but if worst comes to worst you can just buy cosplay online.
Depends on the cosplay. It could be made out of satin, polyester, cotton or many other things.
Yes. He is the creator of Homestuck.
No there isn't one. But you could just find a regular coffee shop and start meeting there in cosplay with your friends. In time, it might become a cosplay cafe :)
You can read "Homestuck" on the website www.homestuck.com. The entire webcomic is available for free to read online.
As fo now there is no Homestuck Manga in existence.
Cosplay is short for Costume Play. Although the majority of costumes are of anime and video game characters, it could be a costume for anything. You could dress up as a dog and it would still count as cosplay.
No, anime has a very distinctive look that Homestuck does not have, anime also is generally reserved for animation that has come out of Japan or another area of Asia while Homestuck is western. While Homestuck has had influence from anime, it is not in and of itself anime.
It is basically an interview that describes your cosplay. they have questions that you answer such as , What got you into cosplay? How did you decide on this cosplay? How did you put together this cosplay? Basically a self interview on cosplay.