I spend $60-100 each visit. It breaks down to like 25-50$ a month, but I don't go down to my comic shop every other week..i go every other month.
So I basically put money aside from the 2-3 pay days between each visit. The reason it varies is because they go ahead an pull comics for me, and before I cash out I check if there is anything else (new) or if I want to finally just buy them collection style books (IE: I bought both Kickass and Kickass2 Book, and the 1st of kickass 3 last visit).
How do I afford them? Well I have a full time job :/
I stopped collecting when Marvel got ridiculous with their "you must follow 18 different books to follow the plot" bit. I mean, in a way, it was interesting that they made an effort to tie their world together like that, but it also meant you couldn't just follow a handful of books and enjoy them for themselves anymore. Not sure if they still do this
They still kind of do this. Both DC and Marvel did this "reboot" thing about a year (or 2) ago. Marvel is really bad at this cross comic thing. ATM it is not as bad as it will, i'm sure, to be (they just did a Avengers vs. X-men thing...I didn't buy all 40000 comics to get the story lol).
From what I understand DC does it as well, or at least they this time around? I'm not 100% as I don't read DC.