Wow, I am blown away by what you all are posting. My wife and I, with a 1 year old, live very Mustachian. I am a stay at home dad and she works at a research lab, making $91k a year. We save over half of her salary quite easily.
We currently rent a 2 bedroom place for $1450/month. It is old, poorly made, and we can hear EVERYTHING our neighbors do. However, it is the cheapest place we can find within biking/walking distance of everything.
We are looking at houses within a few miles from her work, and the cheapest we can find is $650k. Or 7x my wife's salary.
We leave in the SF Bay Area (east bay). I can't imagine finding a house for $45k or $70k, which would be the salary/house price ratio some of you are mentioning. Amazing.
I am a transplant to Maryland from the SF region. In fact, I was born and raised in Alameda. Wife and I 'escaped' the bay area in 1998, 2 days after I graduated from CSU Hayward and moved to her home town in ruralish western Maryland. Our #1 reason? Housing prices.
We bought out first home (3 br 2 bath all brick 2 story american 4 square style house on 1/3 of an acre) in 1998 for 130k. At the time, we were making about 80k so about 1.75 times earnings. Same house in Alameda would have been at least 300k then, probably MUCH higher now.
Out retirement house we just bought last year. It is a small cabin on 4 acres in very far western Maryland. Basically the middle of the Appalachian mountain range near Deep Creek Lake. It is 2 br 1 bath, 780 sq ft. WE LOVE IT. Bought it for 53K, with cash, current income is just under 100k.
While I understand and in many ways agree with living close to work = lower total costs and higher incomes, you can also do the 'opposite' approach and still become FI very quickly. By opposite I mean live rural and grow a lot of your own food and heat with wood from your own woodlot. That coupled with the MASSIVELY lower cost of housing can make up for the lower (in general) income and the need for a vehicle that you may not have in a city.
I know there are a few of us 'rural' MMM cousin's here and on ERE, but sometimes it does not seem so. One thing that also helps is the increasing ability to work remotely. Technically, I work for a Silicon Valley tech firm (Intuit) for a good pat of the year (tax season) and make way above average income for this area (still way lower than many MMMers). Yet I have never even once been to Mountain View (where Intuit is located) or even met with anyone from the company in person. Wife is a teacher for the local school system. We both realized pretty early in our marriage that we preferred country living and have thus traded larger salaries for what we consider a better quality of life. Others I understand prefer city living. To each his own. But many MMM principals can be applied to life in both extremes.