There actually stupid as fuck, spending 40-80 hours a week collecting coupons to save a few hundred on grocerys. If they got off there ass and got a job they could buy there grocerys legitimantly and have a few hundred to spare. gotta think outside the box on that one.
Only spend that much time if you are doing all the work yourself. There are databases out there that if you are nifty can really help you. I don't do it myself but my sis is in college and hasn't spent a cent on food in 3 and a half years... She actually donates most of it to the food bank in the city her college is located in, its a really day and night city, one side of the tracks and the other.
Not really preppers, but i know a spot for singles looking for other singles who are into permaculture
http://www.permies.com/forums/f-42/permaculture-singles
I love permies, have been reading over there for a while. I wish gardenweb could get their shit together to be as easy to use as permies, wealth of information on gardenweb, more old timey gardening than permaculture though I think they might have a section for it.