Not that it matters much, and this is only anecdotal but I had friends who would smoke pretty frequently. A lot of call centers, and retail spots would drug test. My friends would still get the job if they got past the initial interview. It seems like most companies are more interested in harder drugs, which I can understand.

On topic: I think that if you're looking for a cost effective way to live, do what someone said earlier and move to a less prominent neighborhood. This seems like it would be more along the lines of "fun to do for a couple weeks".