I've heard of some realistic pre-existing health conditions that required $600+/month for specialty meds, but if that $7000+ per year is enough to make the difference in your 'retirement', it wouldn't be too bad to get a part time job to cover your cost.
Expensive. No way around it.
It seems low, but not that low, at least relative to how much I pay as a 20-something guy scaled to three people.
Let's play dueling anecdotes.
$300 a month was right around the cost of my COBRA premium for a group plan covering myself only, circa 2006.
$150 a month was what I paid as for an individual plan in my mid 20s circa 1998, and that was for a plan with relatively spare coverage and high deductibles. Perfectly healthy (arguably above average), living in a community that was also arguably above national averages for health statistics and below national average living costs.
I'm very skeptical of the truth of any claim that one could cover a family at $300 a month. Especially in 2013.
Heck, I'm somewhat skeptical that there are people out there nowadays who've been able to buy reasonable coverage on the individual market at all. I know people who don't have to worry much about money but who've still found it a hassle to get insured.
Not to mention that you need to somehow figure out how to rent an apartment for three in SF for less then $300 a month.
[1] http://www.mrmoneymustache.com/2012/06/21/i-just-gave-up-400...
So technically the blog money was somewhat covered in the article, though in a way that I agree is likely very misleading.
As a "living frugal guru" you can't exactly come right out and say "Also, I'm making a bunch of money by selling advertising to you all", though it is almost certainly the truth.
I pay ~600$/month to have a 4 1/2 apartment close to a big-chain supermarket and all necessary amenities. This includes the Hydro bill, the fridge and oven-stove. I have an interior pool. Yes, at that price. Food is about 500$ a month. Internet a further 60$, for a 30/8 Cable pipe.
I'm about 200km from Montreal, close to a university.
He says he lives in a four bedroom four bathroom house. And he says he lives in what he believes to be one of the nicest neighborhoods in Longmont. His wife also states that the house has around 2600 square feet. That means the house is worth at least $200k. I would suggest that it would be worth at least $300k if it was older. You could get a little bit bigger house for $400k though. I wouldn't say that Longmont is an expensive place to live, it is definitely a lot cheaper than its neighbor Boulder, but I would say there are a lot of cheaper places to live.
http://www.mrmoneymustache.com/2011/05/11/the-elephant-in-th...