$650 a month? My utilities, insurance, and food budget easily exceed that, nevermind rent. My first job paid $35k/year, which was comfortable enough (in San Diego), but I was living paycheck to paycheck.
The problem with budgets like this is that they work for some people, not everybody, and set up artificial expectations (i.e. in terms of crowd funding or other capital). I am definitely an advocate of frugal budgets, but there is a line. I don't see $650 month working when you have a wife, kid(s), dog(s), mortgages, and/or car payments - but then again many independent developers are wise enough to not take on those things. I have all but the mortgage, and I consider my burn rate of $3k/month pretty frugal.