My number is roughly in line with the $700/100k figure. I'm assuming 20% down, so the loan is for $400k. If your credit is excellent, and you don't live in one of the high-tax areas, $2000 loan payment + $500 taxes is doable.
As for rent increases, I've never not had a rent increase in 8 years of renting in Chicago and Atlanta. It's standard practice in the city.
I guess my bottom line with my original comment was, I can think of a lot better uses for the money, time, and effort it takes to buy a $500,000 condo, and to me the returns in my quality of life vastly outweigh any sort of long-term security you might feel from owning a home
My girlfriend and I bought a house together a year after we finished university. We're now married. We found a beautiful 100-year old brick house in a village in the UK an hour from my work, 30 minutes from hers. It's just big enough for the family that we want in the future so we're not planning on moving.
We bought it because we wanted to have our own space to live and raise a family in. Every penny that we pay off is ours in equity. The interest base rate is so insanely low (0.5% in the UK) that we hardly pay any interest on the mortgage. We've worked hard to pay off as much of the mortgage as possible, forgoing holidays for a couple of years, so it's now more ours than the banks. In a decade or two it will be ours entirely. If we rented (and some of the houses in the village can be rented) we would pay twice as much each month and having nothing to show for it after decades.
We're close to two major UK cities, so we are not out in the sticks. We're both young academics, so we are certainly not rich.
As a couple we have a lot of fun decorating, remodelling and maintaining it. The previous owners had windows that weren't in keeping with the style so together we replaced them with hand crafted sash windows. Every summer we spend a glorious weekend having fun painting all the woodwork together.
When we die we will be able to pass on our house and its value to our children. It will be the house they grew up in, in the village they grew up in. They will either be able to sell it to get our life savings, meaning they or their children can buy their dream home, or perhaps they'll build a family in it as well.
Having your own house is about having your own space - your own castle.
Mostly it depends on your circumstances. If you're single and you change jobs relatively often, it doesn't make sense to buy a house. If you have children it's cheaper to buy a house in a good school district than to send your kids to private schools.
I'm genuinely fascinated by this, because it really does seem like American society frowns upon people who don't own a home by a certain age, especially when children are involved, almost as if a backyard is absolutely fundamental to the child-rearing process.
I don't know about the USA, but with current interest rates and the end of the housing boom a couple of years ago, in the UK it's often cheaper to buy than to rent, assuming you can get the deposit together.
* note my experience is based on living primarily in SF and LA, so if you are willing to put up with Middle America I'm sure you can find much better value