On the contrary, I see the expired and off-brand/wacko film game to be for those that can really afford it. You are going into the trouble, time and expense to use something with unpredictable results. That means you're either shooting it for careless fun (ie shots you don't care about) or have a specific purpose (think Lomo..which is kind of careless fun). Neither of these are prudent or the norm for someone with no money. Saving $3/roll to buy 10 year old expired film only to find it is garbage means you wasted whatever you paid to buy and develop the film and missed out on some photos.
Not saying people shouldn't try expired or off-brand or whatever you define as non-mainstream film. Personally I shot a lot of expired and off-brand stuff in 2013. I got frustrated and never got anything consistent but whatever floats your boat and I am not saying that you cannot get good results otherwise (as demonstrated in this thread). I just want to know what I'm in for so now just go for fresh film from Kodak and Ilford plus I'm thinking that by giving them my money they stay in business that little bit longer.